1 files changed, 45 insertions, 0 deletions
diff --git a/lib/system_check/incoming_email/imap_authentication_check.rb b/lib/system_check/incoming_email/imap_authentication_check.rb
new file mode 100644
index 00000000000..dee108d987b
--- /dev/null
+++ b/lib/system_check/incoming_email/imap_authentication_check.rb
@@ -0,0 +1,45 @@
+module SystemCheck
+  module IncomingEmail
+    class ImapAuthenticationCheck < SystemCheck::BaseCheck
+      set_name 'IMAP server credentials are correct?'
+
+      def check?
+        if mailbox_config
+          begin
+            imap = Net::IMAP.new(config[:host], port: config[:port], ssl: config[:ssl])
+            imap.starttls if config[:start_tls]
+            imap.login(config[:email], config[:password])
+            connected = true
+          rescue
+            connected = false
+          end
+        end
+
+        connected
+      end
+
+      def show_error
+        try_fixing_it(
+          'Check that the information in config/gitlab.yml is correct'
+        )
+        for_more_information(
+          'doc/administration/reply_by_email.md'
+        )
+        fix_and_rerun
+      end
+
+      private
+
+      def mailbox_config
+        return @config if @config
+
+        config_path = Rails.root.join('config', 'mail_room.yml').to_s
+        erb = ERB.new(File.read(config_path))
+        erb.filename = config_path
+        config_file = YAML.load(erb.result)
+
+        @config = config_file[:mailboxes]&.first
+      end
+    end
+  end
+end