[Octa-list] Undelivered Mail Returned to Sender
Mail Delivery System
MAILER-DAEMON at xxxmail04.xyz
Fri Sep 27 07:08:22 UTC 2019
This is the mail system at host xxxmail04.xyz.
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
<octa-list at redhat.com>: host mx1.redhat.com[126.96.36.199] said: 551 5.7.1 SPF
fail: '[188.8.131.52]'[184.108.40.206], 'redhat.com'; REJECT (in reply to
RCPT TO command)
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