Use new issue email address format

We now use `-issue` in order to support catch all email addresses

changelogs/unreleased/29951-issue-creation-by-email-without-subaddressing.yml

+---
+title: No longer require email subaddressing for issue creation by email
+merge_request: 23523
+author:
+type: changed

lib/gitlab/email/handler/create_issue_handler.rb

@@ -2,21 +2,30 @@
 
 require 'gitlab/email/handler/base_handler'
 
+# handles issue creation emails with these formats:
+#   incoming+gitlab-org-gitlab-ce-20-Author_Token12345678-issue@incoming.gitlab.com
+#   incoming+gitlab-org/gitlab-ce+Author_Token12345678@incoming.gitlab.com (legacy)
 module Gitlab
   module Email
     module Handler
       class CreateIssueHandler < BaseHandler
         include ReplyProcessing
-        attr_reader :project_path, :incoming_email_token
+
+        HANDLER_REGEX        = /\A.+-(?<project_id>.+)-(?<incoming_email_token>.+)-issue\z/.freeze
+        HANDLER_REGEX_LEGACY = /\A(?<project_path>[^\+]*)\+(?<incoming_email_token>.*)\z/.freeze
 
         def initialize(mail, mail_key)
           super(mail, mail_key)
-          @project_path, @incoming_email_token =
-            mail_key && mail_key.split('+', 2)
+
+          if matched = HANDLER_REGEX.match(mail_key.to_s)
+            @project_id, @incoming_email_token = matched.captures
+          elsif matched = HANDLER_REGEX_LEGACY.match(mail_key.to_s)
+            @project_path, @incoming_email_token = matched.captures
+          end
         end
 
         def can_handle?
-          !incoming_email_token.nil? && !incoming_email_token.include?("+") && !mail_key.include?(Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX)
+          incoming_email_token && (project_id || can_handle_legacy_format?)
         end
 
         def execute
@@ -37,11 +46,17 @@ module Gitlab
         # rubocop: enable CodeReuse/ActiveRecord
 
         def project
-          @project ||= Project.find_by_full_path(project_path)
+          @project ||= if project_id
+                         Project.find_by_id(project_id)
+                       else
+                         Project.find_by_full_path(project_path)
+                       end
         end
 
         private
 
+        attr_reader :project_id, :project_path, :incoming_email_token
+
         def create_issue
           Issues::CreateService.new(
             project,
@@ -50,6 +65,10 @@ module Gitlab
             description: message_including_reply
           ).execute
         end
+
+        def can_handle_legacy_format?
+          project_path && !incoming_email_token.include?('+') && !mail_key.include?(Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_LEGACY)
+        end
       end
     end
   end

lib/gitlab/email/handler/create_merge_request_handler.rb

@@ -3,7 +3,7 @@
 require 'gitlab/email/handler/base_handler'
 require 'gitlab/email/handler/reply_processing'
 
-# handles merge request creation emails with these forms:
+# handles merge request creation emails with these formats:
 #   incoming+gitlab-org-gitlab-ce-20-Author_Token12345678-merge-request@incoming.gitlab.com
 #   incoming+gitlab-org/gitlab-ce+merge-request+Author_Token12345678@incoming.gitlab.com (legacy)
 module Gitlab

lib/gitlab/email/handler/create_note_handler.rb

@@ -3,6 +3,8 @@
 require 'gitlab/email/handler/base_handler'
 require 'gitlab/email/handler/reply_processing'
 
+# handles note/reply creation emails with these formats:
+#   incoming+1234567890abcdef1234567890abcdef@incoming.gitlab.com
 module Gitlab
   module Email
     module Handler

lib/gitlab/email/handler/unsubscribe_handler.rb

@@ -2,7 +2,7 @@
 
 require 'gitlab/email/handler/base_handler'
 
-# handles unsubscribe emails with these forms:
+# handles unsubscribe emails with these formats:
 #   incoming+1234567890abcdef1234567890abcdef-unsubscribe@incoming.gitlab.com
 #   incoming+1234567890abcdef1234567890abcdef+unsubscribe@incoming.gitlab.com (legacy)
 module Gitlab
@@ -11,14 +11,14 @@ module Gitlab
       class UnsubscribeHandler < BaseHandler
         delegate :project, to: :sent_notification, allow_nil: true
 
-        HANDLER_REGEX        = /\A(?<replytoken>\w+)#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX}\z/.freeze
-        HANDLER_REGEX_LEGACY = /\A(?<replytoken>\w+)#{Regexp.escape(Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_OLD)}\z/.freeze
+        HANDLER_REGEX        = /\A(?<reply_token>\w+)#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX}\z/.freeze
+        HANDLER_REGEX_LEGACY = /\A(?<reply_token>\w+)#{Regexp.escape(Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_LEGACY)}\z/.freeze
 
         def initialize(mail, mail_key)
           super(mail, mail_key)
 
           matched = HANDLER_REGEX.match(mail_key.to_s) || HANDLER_REGEX_LEGACY.match(mail_key.to_s)
-          @reply_token = matched[:replytoken] if matched
+          @reply_token = matched[:reply_token] if matched
         end
 
         def can_handle?

lib/gitlab/incoming_email.rb

@@ -2,9 +2,9 @@
 
 module Gitlab
   module IncomingEmail
-    UNSUBSCRIBE_SUFFIX     = '-unsubscribe'.freeze
-    UNSUBSCRIBE_SUFFIX_OLD = '+unsubscribe'.freeze
-    WILDCARD_PLACEHOLDER   = '%{key}'.freeze
+    UNSUBSCRIBE_SUFFIX        = '-unsubscribe'.freeze
+    UNSUBSCRIBE_SUFFIX_LEGACY = '+unsubscribe'.freeze
+    WILDCARD_PLACEHOLDER      = '%{key}'.freeze
 
     class << self
       def enabled?

spec/fixtures/emails/valid_new_issue.eml

 Return-Path: <jake@adventuretime.ooo>
 Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
 Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
-Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq-gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
 Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
 Date: Thu, 13 Jun 2013 17:03:48 -0400
 From: Jake the Dog <jake@adventuretime.ooo>
-To: incoming+gitlabhq/gitlabhq+auth_token@appmail.adventuretime.ooo
+To: incoming+gitlabhq-gitlabhq-project_id-auth_token-issue@appmail.adventuretime.ooo
 Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
 Subject: New Issue by email
 Mime-Version: 1.0

spec/fixtures/emails/valid_new_issue_empty.eml

 Return-Path: <jake@adventuretime.ooo>
 Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
 Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
-Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq-gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
 Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
 Date: Thu, 13 Jun 2013 17:03:48 -0400
 From: Jake the Dog <jake@adventuretime.ooo>
-To: incoming+gitlabhq/gitlabhq+auth_token@appmail.adventuretime.ooo
+To: incoming+gitlabhq-gitlabhq-project_id-auth_token-issue@appmail.adventuretime.ooo
 Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
 Subject: New Issue by email
 Mime-Version: 1.0

spec/fixtures/emails/valid_new_issue_legacy.eml

+Return-Path: <jake@adventuretime.ooo>
+Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
+Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
+Date: Thu, 13 Jun 2013 17:03:48 -0400
+From: Jake the Dog <jake@adventuretime.ooo>
+To: incoming+gitlabhq/gitlabhq+auth_token@appmail.adventuretime.ooo
+Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+Subject: New Issue by email
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+X-Sieve: CMU Sieve 2.2
+X-Received: by 10.0.0.1 with SMTP id n7mr11234144ipb.85.1371157428600; Thu,
+ 13 Jun 2013 14:03:48 -0700 (PDT)
+X-Scanned-By: MIMEDefang 2.69 on IPv6:2001:470:1d:165::1
+
+The reply by email functionality should be extended to allow creating a new issue by email.
+
+* Allow an admin to specify which project the issue should be created under by checking the sender domain.
+* Possibly allow the use of regular expression matches within the subject/body to specify which project the issue should be created under.

spec/fixtures/emails/valid_new_issue_with_quote.eml

 Return-Path: <jake@adventuretime.ooo>
 Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
 Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
-Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq-gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
 Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
 Date: Thu, 13 Jun 2013 17:03:48 -0400
 From: Jake the Dog <jake@adventuretime.ooo>
-To: incoming+gitlabhq/gitlabhq+auth_token@appmail.adventuretime.ooo
+To: incoming+gitlabhq-gitlabhq-project_id-auth_token-issue@appmail.adventuretime.ooo
 Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
 Subject: New Issue by email
 Mime-Version: 1.0

spec/fixtures/emails/valid_new_merge_request_legacy.eml

+Return-Path: <jake@adventuretime.ooo>
+Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
+Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq-gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
+Date: Thu, 13 Jun 2013 17:03:48 -0400
+From: Jake the Dog <jake@adventuretime.ooo>
+To: incoming+gitlabhq/gitlabhq+merge-request+auth_token@appmail.adventuretime.ooo
+Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+Subject: feature
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+X-Sieve: CMU Sieve 2.2
+X-Received: by 10.0.0.1 with SMTP id n7mr11234144ipb.85.1371157428600; Thu,
+ 13 Jun 2013 14:03:48 -0700 (PDT)
+X-Scanned-By: MIMEDefang 2.69 on IPv6:2001:470:1d:165::1
+
+Merge request description

spec/fixtures/emails/wrong_issue_incoming_email_token.eml

+Return-Path: <jake@adventuretime.ooo>
+Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
+Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq-gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
+Date: Thu, 13 Jun 2013 17:03:48 -0400
+From: Jake the Dog <jake@adventuretime.ooo>
+To: incoming+gitlabhq-gitlabhq-project_id-bad_token-issue@appmail.adventuretime.ooo
+Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+Subject: New Issue by email
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+X-Sieve: CMU Sieve 2.2
+X-Received: by 10.0.0.1 with SMTP id n7mr11234144ipb.85.1371157428600; Thu,
+ 13 Jun 2013 14:03:48 -0700 (PDT)
+X-Scanned-By: MIMEDefang 2.69 on IPv6:2001:470:1d:165::1

spec/lib/gitlab/email/handler/create_issue_handler_spec.rb

@@ -11,7 +11,7 @@ describe Gitlab::Email::Handler::CreateIssueHandler do
     stub_config_setting(host: 'localhost')
   end
 
-  let(:email_raw) { fixture_file('emails/valid_new_issue.eml') }
+  let(:email_raw) { email_fixture('emails/valid_new_issue.eml') }
   let(:namespace) { create(:namespace, path: 'gitlabhq') }
 
   let!(:project)  { create(:project, :public, namespace: namespace, path: 'gitlabhq') }
@@ -23,21 +23,57 @@ describe Gitlab::Email::Handler::CreateIssueHandler do
     )
   end
 
+  context "when email key" do
+    let(:mail) { Mail::Message.new(email_raw) }
+
+    it "matches the new format" do
+      handler = described_class.new(mail, "h5bp-html5-boilerplate-#{project.project_id}-#{user.incoming_email_token}-issue")
+
+      expect(handler.instance_variable_get(:@project_id).to_i).to eq project.project_id
+      expect(handler.instance_variable_get(:@incoming_email_token)).to eq user.incoming_email_token
+      expect(handler.can_handle?).to be_truthy
+    end
+
+    it "matches the legacy format" do
+      handler = described_class.new(mail, "h5bp/html5-boilerplate+#{user.incoming_email_token}")
+
+      expect(handler.instance_variable_get(:@project_path)).to eq 'h5bp/html5-boilerplate'
+      expect(handler.instance_variable_get(:@incoming_email_token)).to eq user.incoming_email_token
+      expect(handler.can_handle?).to be_truthy
+    end
+
+    it "doesn't match either format" do
+      handler = described_class.new(mail, "h5bp-html5-boilerplate+something+invalid")
+
+      expect(handler.can_handle?).to be_falsey
+    end
+  end
+
   context "when everything is fine" do
-    it "creates a new issue" do
-      setup_attachment
+    shared_examples "a new issue" do
+      it "creates a new issue" do
+        setup_attachment
 
-      expect { receiver.execute }.to change { project.issues.count }.by(1)
-      issue = project.issues.last
+        expect { receiver.execute }.to change { project.issues.count }.by(1)
+        issue = project.issues.last
+
+        expect(issue.author).to eq(user)
+        expect(issue.title).to eq('New Issue by email')
+        expect(issue.description).to include('reply by email')
+        expect(issue.description).to include(markdown)
+      end
+    end
+
+    it_behaves_like "a new issue"
 
-      expect(issue.author).to eq(user)
-      expect(issue.title).to eq('New Issue by email')
-      expect(issue.description).to include('reply by email')
-      expect(issue.description).to include(markdown)
+    context "creates a new issue with legacy email address" do
+      let(:email_raw) { fixture_file('emails/valid_new_issue_legacy.eml') }
+
+      it_behaves_like "a new issue"
     end
 
     context "when the reply is blank" do
-      let(:email_raw) { fixture_file("emails/valid_new_issue_empty.eml") }
+      let(:email_raw) { email_fixture("emails/valid_new_issue_empty.eml") }
 
       it "creates a new issue" do
         expect { receiver.execute }.to change { project.issues.count }.by(1)
@@ -50,7 +86,7 @@ describe Gitlab::Email::Handler::CreateIssueHandler do
     end
 
     context "when there are quotes in email" do
-      let(:email_raw) { fixture_file("emails/valid_new_issue_with_quote.eml") }
+      let(:email_raw) { email_fixture("emails/valid_new_issue_with_quote.eml") }
 
       it "creates a new issue" do
         expect { receiver.execute }.to change { project.issues.count }.by(1)
@@ -76,7 +112,7 @@ describe Gitlab::Email::Handler::CreateIssueHandler do
     end
 
     context "when we can't find the incoming_email_token" do
-      let(:email_raw) { fixture_file("emails/wrong_incoming_email_token.eml") }
+      let(:email_raw) { email_fixture("emails/wrong_issue_incoming_email_token.eml") }
 
       it "raises an UserNotFoundError" do
         expect { receiver.execute }.to raise_error(Gitlab::Email::UserNotFoundError)
@@ -91,4 +127,8 @@ describe Gitlab::Email::Handler::CreateIssueHandler do
       end
     end
   end
+
+  def email_fixture(path)
+    fixture_file(path).gsub('project_id', project.project_id.to_s)
+  end
 end

spec/lib/gitlab/email/handler/create_merge_request_handler_spec.rb

@@ -15,10 +15,10 @@ describe Gitlab::Email::Handler::CreateMergeRequestHandler do
     TestEnv.clean_test_path
   end
 
+  let(:email_raw) { email_fixture('emails/valid_new_merge_request.eml') }
   let(:namespace) { create(:namespace, path: 'gitlabhq') }
 
   let!(:project)  { create(:project, :public, :repository, namespace: namespace, path: 'gitlabhq') }
-  let(:email_raw) { email_fixture('emails/valid_new_merge_request.eml') }
   let!(:user) do
     create(
       :user,
@@ -69,15 +69,25 @@ describe Gitlab::Email::Handler::CreateMergeRequestHandler do
     end
 
     context "when everything is fine" do
-      it "creates a new merge request" do
-        expect { receiver.execute }.to change { project.merge_requests.count }.by(1)
-        merge_request = project.merge_requests.last
-
-        expect(merge_request.author).to eq(user)
-        expect(merge_request.source_branch).to eq('feature')
-        expect(merge_request.title).to eq('Feature added')
-        expect(merge_request.description).to eq('Merge request description')
-        expect(merge_request.target_branch).to eq(project.default_branch)
+      shared_examples "a new merge request" do
+        it "creates a new merge request" do
+          expect { receiver.execute }.to change { project.merge_requests.count }.by(1)
+          merge_request = project.merge_requests.last
+
+          expect(merge_request.author).to eq(user)
+          expect(merge_request.source_branch).to eq('feature')
+          expect(merge_request.title).to eq('Feature added')
+          expect(merge_request.description).to eq('Merge request description')
+          expect(merge_request.target_branch).to eq(project.default_branch)
+        end
+      end
+
+      it_behaves_like "a new merge request"
+
+      context "creates a new merge request with legacy email address" do
+        let(:email_raw) { fixture_file('emails/valid_new_merge_request_legacy.eml') }
+
+        it_behaves_like "a new merge request"
       end
     end
 

spec/lib/gitlab/email/handler/unsubscribe_handler_spec.rb

@@ -17,6 +17,28 @@ describe Gitlab::Email::Handler::UnsubscribeHandler do
 
   let!(:sent_notification) { SentNotification.record(noteable, user.id, mail_key) }
 
+  context "when email key" do
+    let(:mail) { Mail::Message.new(email_raw) }
+
+    it "matches the new format" do
+      handler = described_class.new(mail, "#{mail_key}#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX}")
+
+      expect(handler.can_handle?).to be_truthy
+    end
+
+    it "matches the legacy format" do
+      handler = described_class.new(mail, "#{mail_key}#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_LEGACY}")
+
+      expect(handler.can_handle?).to be_truthy
+    end
+
+    it "doesn't match either format" do
+      handler = described_class.new(mail, "+#{mail_key}#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX}")
+
+      expect(handler.can_handle?).to be_falsey
+    end
+  end
+
   context 'when notification concerns a commit' do
     let(:commit) { create(:commit, project: project) }
     let!(:sent_notification) { SentNotification.record(commit, user.id, mail_key) }
@@ -42,7 +64,7 @@ describe Gitlab::Email::Handler::UnsubscribeHandler do
     end
 
     context 'when using old style unsubscribe link' do
-      let(:email_raw) { fixture_file('emails/valid_reply.eml').gsub(mail_key, "#{mail_key}#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_OLD}") }
+      let(:email_raw) { fixture_file('emails/valid_reply.eml').gsub(mail_key, "#{mail_key}#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_LEGACY}") }
 
       it 'unsubscribes user from notable' do
         expect { receiver.execute }.to change { noteable.subscribed?(user) }.from(true).to(false)

spec/lib/gitlab/email/handler_spec.rb

@@ -19,7 +19,8 @@ describe Gitlab::Email::Handler do
 
   describe 'regexps are set properly' do
     let(:addresses) do
-      %W(sent_notification_key#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX} sent_notification_key path/to/project+merge-request+user_email_token path/to/project+user_email_token)
+      %W(sent_notification_key#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX} sent_notification_key path-to-project-project_id-user_email_token-merge-request path-to-project-user_email_token-issue) +
+        %W(sent_notification_key#{Gitlab::IncomingEmail::UNSUBSCRIBE_SUFFIX_LEGACY} sent_notification_key path/to/project+merge-request+user_email_token path/to/project+user_email_token)
     end
 
     it 'picks each handler at least once' do