[[:start|Home]] > [[:faq|FAQ]] > [[faq:email|Email]] > [[faq:email#email_clients_mobile|Email Clients & Mobile]] > [[faq:email#mail_client_issues_and_troubleshooting|Mail Client Issues and Troubleshooting]] > **Outlook Error 550: Relay not permitted**

====== Outlook Error 550: Relay not permitted ======

If you are getting "The server responded: 550 Relay not permitted" on your Outlook, you may want to check the following settings:

==== 1. SMTP Port Number ====
Make sure the SMTP port number is **587**, and not 25.


==== 2. SMTP Authentication ====
Check and make sure the “My outgoing server (SMTP) requires authentication” and “Use same settings as my incoming mail server” options are selected.


==== 3. Verify Settings ====
Check if your email settings are correct. You can refer to [[faq:email:check_ms_outlook_imap_settings|Outlook IMAP settings]] or [[faq:email:check_ms_outlook_pop3_settings|Outlook POP3 settings]].