> Is there a way to setup 2FA in SMTP auth (with postfix) when the client is
> Outlook? It seems it does not support either GSSAPI (Kerberos) or client
> cert auth.
> Is there any way to get a working 2FA with Outlook in a non MS
The answer is that depends on the SASL backend (Dovecot or Cyrus
SASL library), because Postfix does not implement SASL itself. It
just passes around the SASL server's challenges and the remote