> smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3 > smtpd_tls_protocols = !SSLv2, !SSLv3 > > But that doesn't work. Still the connection is established using TLSv1.
Those are for smtpd or inbound connections. For outbound to O365 you need to look at smtp_ settings. -- br, Petri https://metis.fi/fi/petri tel:+358400505939
