The \u201c550 Relay Not Permitted\u201d error appears when your outgoing mail server cannot verify that you are authorised to send emails. This issue is mainly related to authentication or SMTP configuration settings.<\/p>\n
This error occurs when your mail server rejects outgoing emails because it believes you are trying to send messages through it without proper authentication or authorisation. You may encounter this error if:<\/p>\n Ensure MX records match your hosting server.<\/li>\n<\/ol>\n<\/li>\n If SPF doesn’t authorise the sending IP > the Mail server blocks it.<\/li>\n<\/ul>\n<\/li>\n According to the article above, the \u201c550 Relay Not Permitted\u201d error typically occurs when SMTP settings are incorrect or when authentication is not enabled. Verifying and updating your outgoing mail configuration usually resolves the issue. If the problem persists, contact our support team to help identify and resolve the issue promptly.<\/p>\n Looking to improve your server\u2019s security? Check out our guide on<\/em> How to configure SSH Key authentication on a remote server<\/a><\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" The \u201c550 Relay Not Permitted\u201d error appears when your outgoing mail server cannot verify that you are authorised to send emails. This issue is mainly related to authentication or SMTP…<\/p>\n
\nIn short: Server says > You are not <\/a>allowed to send mail through me!<\/strong>
\nError variants may look like:<\/strong><\/p>\n550 Relay not permitted\r\n550 5.7.1 Unable to relay\r\n550 Authentication Required<\/strong><\/pre>\n
What Causes This Error?<\/strong><\/h3>\n
\n
Fixes for the 550 Relay Not Permitted Error<\/strong><\/h3>\n
\n
\nTurn on Outgoing Server Authentication and verify:<\/p>\n\n
\nUse the correct SMTP credentials provided by your host:<\/p>\n\n
\n
\nExample:
\nWrong: noreply@domain.co
\nCorrect:
\nnoreply@domain.com<\/li>\n<\/ol>\n<\/li>\n\n
nslookup -type=mx yourdomain.com<\/pre>\n
\n
v=spf1 a mx include:mailserver.com ~all<\/pre>\n
\n
\nMXToolbox Blacklist Check
\nSpamhaus<\/li>\n\n
\nPort 25 > 587 or 465<\/li>\n
\nSome ISPs block port 25 by default.<\/li>\n<\/ol>\n<\/li>\n
\nFor VPS\/Dedicated server environments:<\/p>\n\n
\nExample for <\/a>Postfix:<\/strong><\/p>\nsmtpd_recipient_restrictions =\r\npermit_sasl_authenticated,\r\npermit_mynetworks,\r\nreject_unauth_destination<\/strong><\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
\nAvoid SMTP errors with a secure and reliable email hosting solution<\/a> designed for consistent delivery.<\/div>\n