msmtp is an SMTP client: it transmits a mail to an SMTP server
(for example, at a free mail provider) which does the delivery.
To use this program with your mail user agent (MUA),
create a configuration file with your mail account(s)
and tell your MUA to call msmtp instead of /usr/sbin/sendmail.

Features include:
- Sendmail compatible interface (command line options and exit codes)
- Many authentication methods: PLAIN, LOGIN, CRAM-MD5, EXTERNAL.
 With GNU SASL, GSSAPI, DIGEST-MD5 and NTLM are also allowed.
- TLS/SSL encrypted connections (including server certificate verification
 and optional sending of client certificate) in separate msmtp-ssl package
- DSN (Delivery Status Notification) support
- RMQS (Remote Message Queue Starting) support (ETRN keyword)
- PIPELINING support for increased transmission speed
- IPv6 support
- LMTP support
- support for multiple accounts

• Ilya Evseev

• msmtp
• msmtp-ssl