On Mon, Oct 04, 2021 at 02:17:33PM +0100, lejeczek wrote: > Is relaying to an Exchange Online servers which - in my case is > imposed as I'm a member of an org - employ MFA, possible with Postfix?
Unlikely. Postfix supports SASL, I don't know what would constitute "MFA" with SASL. > On Exchange's side - I'm looking at sign-in methods available to me > and among those is "Authenticator app" - which, is Postfix is capable > of MFAs, would be a way forward I guess. Are you sure the MFA requirement is for email submission, rather than administrator access? -- Viktor.