3 files changed, 11 insertions, 2 deletions
diff --git a/app/mailers/devise_mailer.rb b/app/mailers/devise_mailer.rb
index 415f6e12885..f7ed61625f4 100644
--- a/app/mailers/devise_mailer.rb
+++ b/app/mailers/devise_mailer.rb
@@ -3,4 +3,12 @@ class DeviseMailer < Devise::Mailer
   default reply_to: Gitlab.config.gitlab.email_reply_to
 
   layout 'devise_mailer'
+
+  protected
+
+  def subject_for(key)
+    subject = super
+    subject << " | #{Gitlab.config.gitlab.email_subject_suffix}" if Gitlab.config.gitlab.email_subject_suffix.present?
+    subject
+  end
 end
diff --git a/app/mailers/emails/members.rb b/app/mailers/emails/members.rb
index 45311690293..7b617b359ea 100644
--- a/app/mailers/emails/members.rb
+++ b/app/mailers/emails/members.rb
@@ -45,7 +45,7 @@ module Emails
       @token = token
 
       mail(to: member.invite_email,
-           subject: "Invitation to join the #{member_source.human_name} #{member_source.model_name.singular}")
+           subject: subject("Invitation to join the #{member_source.human_name} #{member_source.model_name.singular}"))
     end
 
     def member_invite_accepted_email(member_source_type, member_id)
diff --git a/app/mailers/notify.rb b/app/mailers/notify.rb
index aa6b9da82dd..eca6ec29767 100644
--- a/app/mailers/notify.rb
+++ b/app/mailers/notify.rb
@@ -93,6 +93,7 @@ class Notify < BaseMailer
     subject = ""
     subject << "#{@project.name} | " if @project
     subject << extra.join(' | ') if extra.present?
+    subject << " | #{Gitlab.config.gitlab.email_subject_suffix}" if Gitlab.config.gitlab.email_subject_suffix.present?
     subject
   end
 
@@ -110,7 +111,7 @@ class Notify < BaseMailer
     headers['X-GitLab-Reply-Key'] = reply_key
 
     if !@labels_url && @sent_notification && @sent_notification.unsubscribable?
-      headers['List-Unsubscribe'] = unsubscribe_sent_notification_url(@sent_notification, force: true)
+      headers['List-Unsubscribe'] = "<#{unsubscribe_sent_notification_url(@sent_notification, force: true)}>"
 
       @sent_notification_url = unsubscribe_sent_notification_url(@sent_notification)
     end