sendmail compatible syntax. It is based on libESMTP supporting the AUTH
(including the CRAM-MD5 and NTLM SASL mechanisms) and the StartTLS SMTP
extensions.
Features include:
* fully sendmail command line compatible,
* supports the AUTH SMTP extension, with the CRAM-MD5 and NTLM SASL
mechanisms,
* supports the StartTLS SMTP extension,
* requires no administration privileges,
* individual user configuration,
* does not receive mail, expand aliases or manage a queue.
* local mail delivery via a MDA.