Undelivered Mail Returned to Sender

[macuserguru]

If I send an email to the mailing list - I got this error:

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@apple.com>.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.


<macports-users@lists.macports.org>: 550 5.7.1 <macports-users@lists.macports.org>: Recipient address rejected: Message rejected due to: SPF fail - not authorized. Please see http://www.openspf.net/Why?s=mfrom;id=fritzs@gmx.net;ip=17.151.62.28;r=macports-users@lists.macports.org

Reporting-MTA: dns; mail-in6.apple.com
Arrival-Date: Fri, 18 Nov 2016 08:40:43 -0800

Final-Recipient: rfc822; macports-users@lists.macports.org
Status: 5.7.1
Action: failed
Last-Attempt-Date: Fri, 18 Nov 2016 08:40:43 -0800
Diagnostic-Code: smtp; 550 5.7.1 <macports-users@lists.macports.org>: Recipient address rejected: Message rejected due to: SPF fail - not authorized. Please see http://www.openspf.net/Why?s=mfrom;id=fritzs@gmx.net;ip=17.151.62.28;r=macports-users@lists.macports.org

[macuserguru]

I think it's a problem to send from GMX

[danielluke (Daniel J. Luke)]

gmx has an SPF policy that ends with -all indicating that they don't want you to be able to use a mailing list in the 'normal' way. I'm not sure if mailman checks for just this SPF case - but an appropriate dmarc_moderation_action might be able to help workaround it (all of the options are bad, however).

[danielluke (Daniel J. Luke)]

See also this warning about spf policy with -all:

​https://mail.python.org/pipermail/mailman-users/2015-August/079600.html