<source 0.0.0.0:25> auth-optional true require-auth false default-domain yourdomain.com </source> Then restart PowerMTA:
systemctl restart pmta If you’re on the PowerMTA server itself:
<source 0.0.0.0:25> auth-optional true require-auth false default-domain yourdomain.com </source> Then restart PowerMTA:
systemctl restart pmta If you’re on the PowerMTA server itself: