+ _\b4_\b._\b1_\b6 _\bS_\bM_\bT_\bP _\bS_\bu_\bp_\bp_\bo_\br_\bt _\b(_\bO_\bP_\bT_\bI_\bO_\bN_\bA_\bL_\b)
+
+ Mutt-ng can be built using a library called ``libESMTP'' which provides SMTP
+ functionality. When configure was called with --with-libesmtp or the output
+ muttng -v contains +USE_LIBESMTP, this will be or is the case already.
+
+ To enable sending mail directly via SMTP without an MTA such as Postfix or
+ SSMTP and the like, simply set the _\b$_\bs_\bm_\bt_\bp_\b__\bh_\bo_\bs_\bt (section 6.4.285 , page 148)
+ variable pointing to your SMTP server.
+
+ Authentication mechanisms are available via the _\b$_\bs_\bm_\bt_\bp_\b__\bu_\bs_\be_\br (section 6.4.289 ,
+ page 149) and _\b$_\bs_\bm_\bt_\bp_\b__\bp_\ba_\bs_\bs (section 6.4.286 , page 148) variables.
+
+ Transport Encryption via the StartTLS command is also available. For this to
+ work, first of all Mutt-ng must be built with SSL or GNUTLS. Secondly, the
+ _\b$_\bs_\bm_\bt_\bp_\b__\bu_\bs_\be_\b__\bt_\bl_\bs (section 6.4.288 , page 149) variable must be either set to
+ ``enabled'' or ``required.'' In both cases, StartTLS will be used if the server
+ supports it: for the second case, the connection will fail if it doesn't while
+ switching back to unencrypted communication for the first one.
+
+ _\b4_\b._\b1_\b7 _\bM_\ba_\bn_\ba_\bg_\bi_\bn_\bg _\bm_\bu_\bl_\bt_\bi_\bp_\bl_\be _\bI_\bM_\bA_\bP_\b/_\bP_\bO_\bP_\b/_\bN_\bN_\bT_\bP _\ba_\bc_\bc_\bo_\bu_\bn_\bt_\bs _\b(_\bO_\bP_\bT_\bI_\bO_\bN_\bA_\bL_\b)