Not sure where to look for the error with this message:
This message I only get when sending an E-Mail with an attachment.
I had the problem when only iRedMail did the signing and I still have the problem when PMG does the signing only.
Did a check here https://www.mail-tester.com scored a 10/10.
Is there anything I can do on my side?
Code:
This is the mail system at host mail.example.com.
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
<team@linexo.com>: host mail.wertgarantie.de[145.253.223.179] said: 550 5.7.1
Rejected - DKIM check failed (in reply to end of DATA command)This message I only get when sending an E-Mail with an attachment.
I had the problem when only iRedMail did the signing and I still have the problem when PMG does the signing only.
Did a check here https://www.mail-tester.com scored a 10/10.
Is there anything I can do on my side?