Remote server returned authentication required to relay → 550 Please turn on SMTP Authentication in your mail client
What is the issue you’re encountering
Can’t send emails to my domain from an outlook.com address
What steps have you taken to resolve the issue?
I already deleted the domain from Cloudflare and add it again. Already change the NS
What feature, service or problem is this related to?
Mail records
What are the steps to reproduce the issue?
I’m experiencing an issue where I can send emails from my domain, but I am unable to receive them. Everything was working correctly before, but I recently noticed that incoming emails are no longer reaching my domain.
My domain itself is functioning properly, and it is hosted with GoDaddy. The error I receive is related to SMTP authentication, and it appears that my email client is not permitted to relay through the server without authentication.
The DNS records in Cloudflare were added automatically, and I have not made any manual changes to them. Could you please help me determine if there have been any recent changes or if my current DNS configuration might be impacting email reception?
Furthermore, you’ll experience some issue if you’ll be accessing www.admin.domain.com as this is a case for deep-level sub-domain:
To make sure it works fine over proxied Cloudflare, you’d have to purchase additional Advanced Certificate Manager which does cover 2nd and other deep-level sub-domains as Cloudflare’s Unverisal SSL covers only 1st level.
I tried what you mentioned and also some things that apply from the links you shared. I also tried other things I found in a different search. But it’s still the same.
Thank you for the response; I think I didn’t explain myself well.
I have a domain registered with GoDaddy, and the DNS is managed through Cloudflare.
When I try to send emails to this domain from my Outlook.com or Gmail.com account (using the web interface, not through any email clients), I receive an error.
However, from the domain (through Webmin in Cpanel, or from an email client on iOS), I can send emails to Outlook.com or Gmail.com.
In other words, it only doesn’t allow me to receive emails.
I’ve attached a screenshot of my DNS configuration in Cloudflare.
(DNS-only), such as:
proxied Cloudflare, you’d have to purchase additional Advanced Certificate Manager which does cover 2nd and other deep-level sub-domains as Cloudflare’s Unverisal SSL covers only 1st level.