.IR portname/number ]
.RB [ \-sasl ]
.RB [ \-nosasl ]
-.RB [ \-saslmaxssf
-.IR ssf ]
.RB [ \-saslmech
.IR mechanism ]
.RB [ \-user
Base64-encoded data is wrapped with `b64<>'.
(Beware that the SMTP transaction may contain authentication information either
in plaintext or easily decoded base64.)
-The
-.B \-saslmaxssf
-switch can be used to select the maximum value of the Security Strength Factor.
-This is an integer value and the exact meaning of this value depends on the
-underlying SASL mechanism. A value of 0 disables encryption.
.PP
If
.B nmh