On 11/07/2013 08:38 PM, nik600 wrote: > > you can auth using STARTSSL on standard port 25
Port 25 should be for MX to MX communication, not for submission. > you can auth using TLS/SSL on standard port 465 Port 465 is SMTPS which is deprecated. You should be using the submission port (587) with STARTTLS for submission. There is a commented example in your master.cf file. You can safely force encryption on this port because you don't need to worry about inbound mail from other MXes. Peter
