diff --git a/ruby/lib/jam_ruby/app/mailers/user_mailer.rb b/ruby/lib/jam_ruby/app/mailers/user_mailer.rb
index 22a66b54e..6a5d5ec92 100644
--- a/ruby/lib/jam_ruby/app/mailers/user_mailer.rb
+++ b/ruby/lib/jam_ruby/app/mailers/user_mailer.rb
@@ -218,31 +218,176 @@
         end
       end
 
-      def scheduled_session_invitation(email, msg, session_id)
+      def scheduled_session_invitation(email, msg, session)
+        subject = "Session Invitation"
+        unique_args = {:type => "scheduled_session_invitation"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_rsvp(email, msg)
+      def scheduled_session_rsvp(email, msg, session)
+        subject = "Session RSVP"
+        unique_args = {:type => "scheduled_session_rsvp"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_rsvp_approved(email, msg)
+      def scheduled_session_rsvp_approved(email, msg, session)
+        subject = "Session RSVP Approved"
+        unique_args = {:type => "scheduled_session_rsvp_approved"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_rsvp_cancelled(email, msg)
+      def scheduled_session_rsvp_cancelled(email, msg, session)
+        subject = "Session RSVP Cancelled"
+        unique_args = {:type => "scheduled_session_rsvp_cancelled"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_rsvp_cancelled_org(email, msg)
+      def scheduled_session_rsvp_cancelled_org(email, msg, session)
+        subject = "Your Session RSVP Cancelled"
+        unique_args = {:type => "scheduled_session_rsvp_cancelled_org"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_cancelled(email, msg)
+      def scheduled_session_cancelled(email, msg, session)
+        subject = "Session Cancelled"
+        unique_args = {:type => "scheduled_session_cancelled"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_rescheduled(email, msg)
+      def scheduled_session_rescheduled(email, msg, session)
+        subject = "Session Rescheduled"
+        unique_args = {:type => "scheduled_session_rescheduled"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_reminder(email, msg)
+      def scheduled_session_reminder(email, msg, session)
+        subject = "Session Rescheduled"
+        unique_args = {:type => "scheduled_session_reminder"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
-      def scheduled_session_comment(email, msg)
+      def scheduled_session_comment(email, msg, comment, session)
+        subject = "New Session Comment"
+        unique_args = {:type => "scheduled_session_comment"}
+        @body = msg
+        @session_name = session.description
+        @session_date = session.scheduled_start
+        @comment = comment
+        @session_url = "#{APP_CONFIG.external_root_url}/sessions/#{session.id}/details"
+        sendgrid_category "Notification"
+        sendgrid_unique_args :type => unique_args[:type]
+
+        sendgrid_recipients([email])
+        sendgrid_substitute('@USERID', [User.id_for_email(email)])
+
+        mail(:to => email, :subject => subject) do |format|
+          format.text
+          format.html
+        end
       end
 
       def band_session_join(email, msg, session_id)
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.html.erb
index e69de29bb..d0ff59dc2 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.html.erb
@@ -0,0 +1,5 @@
+<% provide(:title, 'Scheduled Session Cancelled') %>
+
+<p><%= @body %></p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_cancelled.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.html.erb
index e69de29bb..7ebe56c8f 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.html.erb
@@ -0,0 +1,7 @@
+<% provide(:title, 'Scheduled Session Comment') %>
+
+<p><%= @body %></p>
+
+<p><%= @comment %></p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.text.erb
index e69de29bb..6a7dc5f59 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_comment.text.erb
@@ -0,0 +1,8 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+<%= @comment %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.html.erb
index e69de29bb..7e62e683a 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session Invitation') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_invitation.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.html.erb
index e69de29bb..1521bd74a 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session Reminder') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_reminder.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.html.erb
index e69de29bb..e0e534018 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session Reschedule') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rescheduled.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.html.erb
index e69de29bb..c615903a8 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session RSVP') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.html.erb
index e69de29bb..03305ce72 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session RSVP Approved') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_approved.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.html.erb
index e69de29bb..b7740ea1a 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session RSVP Cancelled') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.html.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.html.erb
index e69de29bb..3cfa830d0 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.html.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.html.erb
@@ -0,0 +1,10 @@
+<% provide(:title, 'Scheduled Session RSVP Cancelled By Organizer') %>
+
+<p><%= @body %></p>
+
+<p>
+  <%= @session_name %><br/>
+  <%= @session_date %>
+</p>
+
+<p><a style="color: #588C98;" href="<%= @session_url %>">View Session Details</a></p>
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.text.erb b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.text.erb
index e69de29bb..40ec73f65 100644
--- a/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.text.erb
+++ b/ruby/lib/jam_ruby/app/views/jam_ruby/user_mailer/scheduled_session_rsvp_cancelled_org.text.erb
@@ -0,0 +1,6 @@
+<%= @body %>
+
+<%= @session_name %>
+<%= @session_date %>
+
+See session details at <%= @session_url %>.
\ No newline at end of file
diff --git a/ruby/lib/jam_ruby/models/notification.rb b/ruby/lib/jam_ruby/models/notification.rb
index 71677e970..4ca4f1935 100644
--- a/ruby/lib/jam_ruby/models/notification.rb
+++ b/ruby/lib/jam_ruby/models/notification.rb
@@ -188,19 +188,19 @@ module JamRuby
             return "A musician has cancelled an RSVP to your session."
 
           when NotificationTypes::SCHEDULED_SESSION_RSVP_CANCELLED_ORG
-            return "The session organizer has cancelled this session:"
+            return "The session organizer has cancelled your RSVP to this session."
 
           when NotificationTypes::SCHEDULED_SESSION_CANCELLED
-            return "The session organizer has cancelled this session:"
+            return "The session organizer has cancelled this session."
 
           when NotificationTypes::SCHEDULED_SESSION_RESCHEDULED
-            return "The following session has been rescheduled:"
+            return "The following session has been rescheduled."
 
           when NotificationTypes::SCHEDULED_SESSION_REMINDER
             return "A session to which you have RSVPd will begin in one hour, so get ready to play!"
 
           when NotificationTypes::SCHEDULED_SESSION_COMMENT
-            return "New message about session:"
+            return "New message about session."
 
           # recording notifications
           when NotificationTypes::MUSICIAN_RECORDING_SAVED
@@ -589,18 +589,26 @@ module JamRuby
 
         notification_msg = format_msg(notification.description, {:user => source_user, :session => music_session})
 
-        msg = @@message_factory.scheduled_session_invitation(
-          target_user.id,
-          music_session.id,
-          source_user.photo_url,
-          notification_msg,
-          music_session.description,
-          music_session.scheduled_start,
-          notification.id,
-          notification.created_date
-        )
+        if target_user.online
+          msg = @@message_factory.scheduled_session_invitation(
+            target_user.id,
+            music_session.id,
+            source_user.photo_url,
+            notification_msg,
+            music_session.description,
+            music_session.scheduled_start,
+            notification.id,
+            notification.created_date
+          )
 
-        @@mq_router.publish_to_user(target_user.id, msg)
+          @@mq_router.publish_to_user(target_user.id, msg)
+        else
+          begin
+            UserMailer.scheduled_session_invitation(target_user.email, notification_msg, music_session).deliver
+          rescue => e
+            @@log.error("Unable to send scheduled_session_invitation email to offline user #{target_user.email} #{e}")
+          end
+        end
       end
 
       def send_scheduled_session_rsvp(music_session, user, instruments)
@@ -616,20 +624,28 @@ module JamRuby
 
         notification_msg = format_msg(notification.description, {:user => source_user, :session => music_session})
 
-        msg = @@message_factory.scheduled_session_rsvp(
-          target_user.id,
-          music_session.id,
-          source_user.photo_url,
-          notification_msg,
-          source_user.id,
-          instruments,
-          music_session.description,
-          music_session.scheduled_start,
-          notification.id,
-          notification.created_date
-        )
+        if target_user.online
+          msg = @@message_factory.scheduled_session_rsvp(
+            target_user.id,
+            music_session.id,
+            source_user.photo_url,
+            notification_msg,
+            source_user.id,
+            instruments,
+            music_session.description,
+            music_session.scheduled_start,
+            notification.id,
+            notification.created_date
+          )
 
-        @@mq_router.publish_to_user(target_user.id, msg)
+          @@mq_router.publish_to_user(target_user.id, msg)
+        else
+          begin
+            UserMailer.scheduled_session_rsvp(target_user.email, notification_msg, music_session).deliver
+          rescue => e
+            @@log.error("Unable to send scheduled_session_rsvp email to offline user #{target_user.email} #{e}")
+          end
+        end
       end
 
       def send_scheduled_session_rsvp_approved(music_session, user)
@@ -645,17 +661,25 @@ module JamRuby
 
         notification_msg = format_msg(notification.description, {:session => music_session})
 
-        msg = @@message_factory.scheduled_session_rsvp_approved(
-          target_user.id,
-          music_session.id,
-          notification_msg,
-          music_session.description,
-          music_session.scheduled_start,
-          notification.id,
-          notification.created_date
-        )
+        if target_user.online
+          msg = @@message_factory.scheduled_session_rsvp_approved(
+            target_user.id,
+            music_session.id,
+            notification_msg,
+            music_session.description,
+            music_session.scheduled_start,
+            notification.id,
+            notification.created_date
+          )
 
-        @@mq_router.publish_to_user(target_user.id, msg)
+          @@mq_router.publish_to_user(target_user.id, msg)
+        else
+          begin
+            UserMailer.scheduled_session_rsvp_approved(target_user.email, notification_msg, music_session).deliver
+          rescue => e
+            @@log.error("Unable to send scheduled_session_rsvp_approved email to offline user #{target_user.email} #{e}")
+          end
+        end
       end
 
       def send_scheduled_session_rsvp_cancelled(music_session, user)
@@ -671,17 +695,25 @@ module JamRuby
 
         notification_msg = format_msg(notification.description, {:session => music_session})
 
-        msg = @@message_factory.scheduled_session_rsvp_cancelled(
-          target_user.id,
-          music_session.id,
-          notification_msg,
-          music_session.description,
-          music_session.scheduled_start,
-          notification.id,
-          notification.created_date
-        )
+        if target_user.online
+          msg = @@message_factory.scheduled_session_rsvp_cancelled(
+            target_user.id,
+            music_session.id,
+            notification_msg,
+            music_session.description,
+            music_session.scheduled_start,
+            notification.id,
+            notification.created_date
+          )
 
-        @@mq_router.publish_to_user(target_user.id, msg)
+          @@mq_router.publish_to_user(target_user.id, msg)
+        else
+          begin
+            UserMailer.send_scheduled_session_rsvp_cancelled(target_user.email, notification_msg, music_session).deliver
+          rescue => e
+            @@log.error("Unable to send send_scheduled_session_rsvp_cancelled email to offline user #{target_user.email} #{e}")
+          end
+        end
       end
 
       def send_scheduled_session_rsvp_cancelled_org(music_session, user)
@@ -697,17 +729,25 @@ module JamRuby
 
         notification_msg = format_msg(notification.description, {:session => music_session})
 
-        msg = @@message_factory.scheduled_session_rsvp_cancelled_org(
-          target_user.id,
-          music_session.id,
-          notification_msg,
-          music_session.description,
-          music_session.scheduled_start,
-          notification.id,
-          notification.created_date
-        )
+        if target_user.online
+          msg = @@message_factory.scheduled_session_rsvp_cancelled_org(
+            target_user.id,
+            music_session.id,
+            notification_msg,
+            music_session.description,
+            music_session.scheduled_start,
+            notification.id,
+            notification.created_date
+          )
 
-        @@mq_router.publish_to_user(target_user.id, msg)
+          @@mq_router.publish_to_user(target_user.id, msg)
+        else
+          begin
+            UserMailer.scheduled_session_rsvp_cancelled_org(target_user.email, notification_msg, music_session).deliver
+          rescue => e
+            @@log.error("Unable to send scheduled_session_rsvp_cancelled_org email to offline user #{target_user.email} #{e}")
+          end
+        end
       end
 
       def send_scheduled_session_cancelled(music_session)
@@ -726,17 +766,25 @@ module JamRuby
 
           notification_msg = format_msg(notification.description, {:session => music_session})
 
-          msg = @@message_factory.scheduled_session_cancelled(
-            target_user.id,
-            music_session.id,
-            notification_msg,
-            music_session.description,
-            music_session.scheduled_start,
-            notification.id,
-            notification.created_date
-          )
+          if target_user.online
+            msg = @@message_factory.scheduled_session_cancelled(
+              target_user.id,
+              music_session.id,
+              notification_msg,
+              music_session.description,
+              music_session.scheduled_start,
+              notification.id,
+              notification.created_date
+            )
 
-          @@mq_router.publish_to_user(target_user.id, msg)
+            @@mq_router.publish_to_user(target_user.id, msg)
+          else
+            begin
+              UserMailer.scheduled_session_cancelled(target_user.email, notification_msg, music_session).deliver
+            rescue => e
+              @@log.error("Unable to send scheduled_session_cancelled email to offline user #{target_user.email} #{e}")
+            end
+          end
         end
       end
 
@@ -756,17 +804,25 @@ module JamRuby
 
           notification_msg = format_msg(notification.description, {:session => music_session})
 
-          msg = @@message_factory.scheduled_session_rescheduled(
-            target_user.id,
-            music_session.id,
-            notification_msg,
-            music_session.description,
-            music_session.scheduled_start,
-            notification.id,
-            notification.created_date
-          )
+          if target_user.online
+            msg = @@message_factory.scheduled_session_rescheduled(
+              target_user.id,
+              music_session.id,
+              notification_msg,
+              music_session.description,
+              music_session.scheduled_start,
+              notification.id,
+              notification.created_date
+            )
 
-          @@mq_router.publish_to_user(target_user.id, msg)
+            @@mq_router.publish_to_user(target_user.id, msg)
+          else
+            begin
+              UserMailer.scheduled_session_rescheduled(target_user.email, notification_msg, music_session).deliver
+            rescue => e
+              @@log.error("Unable to send scheduled_session_rescheduled email to offline user #{target_user.email} #{e}")
+            end
+          end
         end
       end
 
@@ -786,17 +842,25 @@ module JamRuby
 
           notification_msg = format_msg(notification.description, {:session => music_session})
 
-          msg = @@message_factory.scheduled_session_reminder(
-            target_user.id,
-            music_session.id,
-            notification_msg,
-            music_session.description,
-            music_session.scheduled_start,
-            notification.id,
-            notification.created_date
-          )
+          if target_user.online
+            msg = @@message_factory.scheduled_session_reminder(
+              target_user.id,
+              music_session.id,
+              notification_msg,
+              music_session.description,
+              music_session.scheduled_start,
+              notification.id,
+              notification.created_date
+            )
 
-          @@mq_router.publish_to_user(target_user.id, msg)
+            @@mq_router.publish_to_user(target_user.id, msg)
+          else
+            begin
+              UserMailer.scheduled_session_reminder(target_user.email, notification_msg, music_session).deliver
+            rescue => e
+              @@log.error("Unable to send scheduled_session_reminder email to offline user #{target_user.email} #{e}")
+            end
+          end
         end
       end
 
@@ -816,18 +880,26 @@ module JamRuby
 
           notification_msg = format_msg(notification.description, {:session => music_session})
 
-          msg = @@message_factory.scheduled_session_comment(
-            target_user.id,
-            music_session.id,
-            notification_msg,
-            comment,
-            music_session.description,
-            music_session.scheduled_start,
-            notification.id,
-            notification.created_date
-          )
+          if target_user.online
+            msg = @@message_factory.scheduled_session_comment(
+              target_user.id,
+              music_session.id,
+              notification_msg,
+              comment,
+              music_session.description,
+              music_session.scheduled_start,
+              notification.id,
+              notification.created_date
+            )
 
-          @@mq_router.publish_to_user(target_user.id, msg)
+            @@mq_router.publish_to_user(target_user.id, msg)
+          else
+            begin
+              UserMailer.scheduled_session_comment(target_user.email, notification_msg, comment, music_session).deliver
+            rescue => e
+              @@log.error("Unable to send scheduled_session_comment email to offline user #{target_user.email} #{e}")
+            end
+          end
         end
       end