I have installed Mailcow on a vsp server. I have no problems so far, but I can’t send or receive mails to certain providers.
The postifix contains the following error:
disconnect from mailhost.domain.de[ip] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7
I have configured mta-sts and tls. But I do not get the error recoverable.
Also, when I send mails, I get the error message:
For further assistance, please send mail to postmaster.
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The mail system
<mail@domain>: TLS is required, but was not offered by the host
Reporting MTA: dns; mail.domain.de
X-Postcow queue ID: 3F5EB60077
X-Postcow sender: rfc822; email@example.com
Date of arrival: Sat, 1 Apr 2023 12:56:41 +0200 (CEST)
End recipient: rfc822; firstname.lastname@example.org
Original recipient: rfc822;email@example.com
Diagnostic code: X-postcow; TLS is required, but was not offered by host