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Yeah, 24 of April for me.

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!

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...

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?

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

Yes I have this issue as well, others too. We have reported it.

I have same Error "550 Authentication Required" but on X13 server. For a few days now.

It seems i've been sending spam without my knowledge. I just found out. 1517 entries this month. I changed my password but I think it will not help. Any ideas what to do? Thanks, Theodore

Fixed! Thanks!:smile:

I got this too, once. Also the Mail doesn't work....

I have the same result either way on Vox...