msmtp 1.4.12

msmtp is an open source SMTP client In the default mode, 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.
In addition to sendmail mode, there are two other modes of operation:
- Server information mode. In this mode, msmtp prints as much information as it can get about a given SMTP server (supported features, maximum mail size, ...).
- Remote Message Queue Starting mode. In this mode, msmtp sends a Remote Message Queue Starting request for a host, domain, or queue to a given SMTP server.
Normally, a system wide configuration file and/or a user configuration file contain information about which SMTP server to use and how to use it , but almost all settings can also be configured on the command line.
The information about SMTP servers is organized in accounts. Each account describes one SMTP server: host name, TLS settings, authentication settings, and so on. Each configuration file can define multiple accounts.
Optional features, depending on external libraries (see the file INSTALL for
usage instructions):
- TLS/SSL support
You need either GnuTLS >= 1.2.0 or OpenSSL >= 0.9.6 for TLS/SSL support. It is also possible to disable TLS/SSL support entirely.
- Additional authentication methods
The built-in authentication code supports the PLAIN, LOGIN, CRAM-MD5, and EXTERNAL mechanisms. When GNU SASL support is enabled, some or all of the mechanisms EXTERNAL, GSSAPI, DIGEST-MD5, CRAM-MD5, PLAIN, LOGIN, and NTLM are available, depending on the compile-time options used for libgsasl. GNU SASL >= 0.2.4 is required.
- Native language support (NLS)
On systems other than GNU/Linux, you need GNU gettext if you want NLS.
Main features:
- Sendmail compatible interface (command line options and exit codes).
- Authentication methods PLAIN, LOGIN, CRAM-MD5, DIGEST-MD5, GSSAPI, and NTLM.
- TLS/SSL both in SMTP-over-SSL mode and in STARTTLS mode. Full certificate trust checks can be performed. A client certificate can be sent.
- Fast SMTP implementation using command pipelining.
- Support for Internationalized Domain Names (IDN).
- DSN (Delivery Status Notification) support.
- RMQS (Remote Message Queue Starting) support (ETRN keyword).
- IPv6 support.
- Support for multiple accounts.