On Tue, 9 Jul 2019 at 17:26, <bilal.ah...@kfueit.edu.pk> wrote: > > Dear Experts, > > I am facing a problem that someone is spoofing my domain address and sending > emails to my own domain users. > I have set valid SPF, DKIM, DMARC for my Mail server. How can I sort this > problem with postfix to stop this spoofing ? > If I filter emails based on SPF this also block many legitimate email with > spf not set properly. > > Bilal Ahmad > Network Administrator
If you use opendkim/opendmarc as milters to postfix then opendmarc should block emails that spoof your domain (as I see you already have dmarc setting p=reject). If this is not happening then probably you have some incorrect settings in opendkim.conf or opendmarc.conf. For instance, in opendmarc.conf you need 'RejectFailures true'.
