How to turn it on Set g_dkim_sign "true" On the web admin interface search for "Create DKIM" then click on the Configure link. Add the DNS setting it suggests for your domains(s). Also add the suggested DMARC settings, (this requires a recent version of surgemail) See https://surgemail.com/knowledge-base/sending-email-to-avoid-spam-filters-best-practices/ How it works: DomainKeys is a cryptographic method … Continue reading DKIM / DomainKeys DMARC