msmtp is an SMTP client. In the default mode, msmtp transmits a mail to an SMTP server which does the delivery. Features include: o SMTP authentication methods PLAIN, LOGIN and CRAM-MD5 o TLS encrypted connections o DSN (Delivery Status Notification) support o RMQS (Remote Message Queue Starting) support (ETRN keyword) o PIPELINING support for increased transmission speed o IPv6 support o support for multiple accounts o sendmail compatible interface (command line options and exit codes) o support for Internationalized Domain Names (IDN)
WWW: http://msmtp.sourceforge.net/
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