Re: User mailing list emails blocked SPF
Posted by
MichaelAtOz on
Jan 10, 2016; 6:34am
URL: https://support.nabble.com/User-mailing-list-emails-blocked-SPF-tp7596457p7596467.html
See
SRS. A simple explanation.
To me it says when nabble forwards the email to the mailing list, using <a_name@gmx.net> as the sender (ie spoofing) it needs to do SRS which changes the from envelope to <SRS0+hash=timwstamp=a_name=gmx.net=nabble_user_number_or_name?@nabble.com> <<=something to tie back to the originator.
Given user=nnnn is used elsewhere, like;
forum.openscad.org/template/NamlServlet.jtp?macro=user_nodes&user=nnnn
More to it for handling bounced mails, but it seems pretty simple, and there appear to be directions for setting it up for the various MTAs.
So no SPF DNS required for nabble.com or openscad.org, that is only for sites who want to stop other spoofing, so possibly something to do, but not part of fixing this issue.