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If you run your own postfix server, the first part is as easy as setting smtp_tls_security_level = may. You don't need to certificate or anything. The DKIM aut
by collinmanderson 11y ago
If you run your own postfix server, the first part is as easy as setting smtp_tls_security_level = may. You don't need to certificate or anything.
The DKIM authentication just requires a self-signed certificate. It doesn't need to be signed by a CA, I believe.