.IR ssf ]
.RB [ \-saslmech
.IR mechanism ]
+.RB [ \-authservice
+.IR service ]
.RB [ \-snoop ]
.RB [ \-user
.IR username ]
.B \-snoop
switch can be used to view the SMTP transaction. (Beware that the
SMTP transaction may contain authentication information either in
-plaintext or easily decoded base64.)
+plaintext or easily decoded base64.) If
+.B \-saslmech xoauth2
+is used, the HTTP transaction is also shown.
.PP
If
.B nmh
.PP
If
.B nmh
+has been compiled with OAuth support, the
+.B \-saslmech xoauth2
+switch will enable OAuth authentication. The
+.B \-user
+switch must be used, and the
+.I user-name
+must be an email address the user has for the service, which must
+be specified with the
+.B \-authservice
+.I service
+switch. Before using this, the user must authorize nmh by running
+.B mhlogin
+and grant authorization to that account. See the
+.B mhlogin
+man page for more details.
+.PP
+If
+.B nmh
has been compiled with TLS support, the
.B \-tls
and
.IR forw (1),
.IR mhbuild (1),
.IR mhparam (1),
+.IR mhlogin (1),
.IR repl (1),
.IR whatnow (1),
.IR mh\-alias (5),