"550 authentication required" in incoming mail X13 server

[cronosel]

This issue is not resolved.
All incoming mail is rejected with this error message. I didn't do anything to cause it and it seems others have the same issue.
Has anyone figure out how to solve this?

Thank you

 

[ctyrd]

This issue is not resolved.
All incoming mail is rejected with this error message. I didn't do anything to cause it and it seems others have the same issue.
Has anyone figure out how to solve this?

Thank you

What is your domain? Use the server webmail client to ring out mail issues. https://x13.x10hosting.com/

 

[cronosel]

My domain is cronos-electronics.gr, I have two mail addresses, the default "cronos@cronos-electronics.gr" and the one used mostly "info@cronos-electronics.gr". None can receive mail.
Webmail (roundcube) shows my existing mails but that's all. What else can I do with it?

 

[ctyrd]

My domain is cronos-electronics.gr, I have two mail addresses, the default "cronos@cronos-electronics.gr" and the one used mostly "info@cronos-electronics.gr". None can receive mail.
Webmail (roundcube) shows my existing mails but that's all. What else can I do with it?

Try removing the www cname record, and the www MX record. Change SPF record too: v=spf1 a mx ip4:198.91.81.13 ip4:198.91.80.251 ~all

 

[cronosel]

Try removing the www cname record, and the www MX record. Change SPF record too: v=spf1 a mx ip4:198.91.81.13 ip4:198.91.80.251 ~all

Thank you for the suggestions but I had no luck.
Without www cname, my site is not discoverable.
With the rest of your suggestions, at some point I stopped receiving the rejection e-mail (with the 550 error) but the mail was not received.
I restored the MX record, left the IP range as you said, still no incoming mail but the rejection mail is received by the sender.

 

[ctyrd]

Thank you for the suggestions but I had no luck.
Without www cname, my site is not discoverable.
With the rest of your suggestions, at some point I stopped receiving the rejection e-mail (with the 550 error) but the mail was not received.
I restored the MX record, left the IP range as you said, still no incoming mail but the rejection mail is received by the sender.

The www CNAME has nothing to do with discovery.

https://cronos-electronics.gr/

https://www.cronos-electronics.gr/

DNS works the same for every domain. You still have 2 MX records. and a CNAME record. https://who.is/dns/cronos-electronics.gr
It will cause issues: https://intodns.com/cronos-electronics.gr

Correct DNS lookup https://who.is/dns/teabag.elementfx.com

 

[cronosel]

DNS works the same for every domain. You still have 2 MX records. and a CNAME record.

OK, I have made my records better but the result is the same: "550 authentication required". The server is reachable but does not accept incoming mail.

Thanks for the intodns.com link, It is very helpful!