I want to use my smtp server to send emails from it.
Emails delivered, but the following error message arrived back to sender's mailbox:
QuoteDisplay MoreThis is the mail system at host server3.domain.tld.
I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.
For further assistance, please send mail to postmaster.
If you do so, please include this problem report. You can
delete your own text from the attached returned message.
The mail system
<info@otherdomain.tld>: host mail.otherdomain.tld[IP] said: 550 5.7.1
rejected due to DKIM ADSP evaluation (in reply to end of DATA command)
Reporting-MTA: dns; server3.domain.tld
X-Postfix-Queue-ID: 082A540F7E
X-Postfix-Sender: rfc822; info@otherdomain.tld
Arrival-Date: Mon, 5 Nov 2018 11:16:20 +0100 (CET)
Final-Recipient: rfc822; info@otherdomain.tld
Original-Recipient: rfc822;info@otherdomain.tld
Action: failed
Status: 5.7.1
Remote-MTA: dns; mail.otherdomain.tld
Diagnostic-Code: smtp; 550 5.7.1 rejected due to DKIM ADSP evaluation
So the PHP code is running on server3.domain.tld, connect to the otherdomain.tld 's smtp server.
Both server is: i-MSCP 1.5.3
OS: Debian Jessie 8.11
Used Plugins: OpenDKIM 2.0.0, PolicydSPF 1.2.0
So again: mails sent well and delivered into mailboxes, but get back the above error message.
What can I do?
DMARC record checked on mxtoolbox.com and it's OK.
