One cPanel account reject every email with the same message. 550-Please turn on SMTP Authentication
Hello!
I'm having this problem with a single cPanel account on a shared server. I already tried everything I found on the forums and in the knowledge base.
Do you have any ideas to try? This is the bounce message.
TLS_AES_256_GCM_SHA384:256 CV=yes: SMTP error from remote mail server after RCPT TO:<hola@domain.com>: 550-Please turn on SMTP Authentication in your mail client.\n550-myserver.com [my_server_ip]:37156 is not permitted to relay through\n550 this server without authentication.
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If you go to cPanel -> Email -> Email Deliverability
is the Email Deliverability Status for that domain Valid?0 -
Yes, everything is ok in Email Deliverability, the problem is receiving.
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Well in that case there is nothing you can do, the problem is in the sending end.
They must correct SPF and/or DKIM records.
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No, that wasn't the problem. The hosting account that I did not receive was mine, I did not receive it from anywhere, all the emails bounced with the same message. I wasn't even receiving cPanel's own messages.
I opened a ticket with cPanel and they did not find the problem, they only responded with links to the knowledge base that I had already read and tried several times.
I finally solved the problem by transferring the account to a secondary server. I deleted the account on the original server and transferred it back from the secondary to the original. Now he receives well.
It's a shame they couldn't find the problem that could help others.
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