邮件发送的客户端-msmtp
2012-10-30 09:28:20 
阿炯
专门负责邮件发送的客户端软件，基于GPL发布。支持TLS/SSL、DNS模式、IPv6、服务器端认证、多用户等特性。支持linux,unix及windows平台。msmtp is an SMTP client.
In the default mode, it transmits a mail to an SMTP server (for example at a free mail provider) which takes care of further 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
Sendmail compatible interface (command line options and exit codes).
TLS/SSL support, including client certificates.
Authentication methods PLAIN, LOGIN, CRAM-MD5, EXTERNAL, GSSAPI, SCRAM-SHA-1, DIGEST-MD5, and NTLM.
PIPELINING support for increased transmission speed.
DSN (Delivery Status Notification) support.
RMQS (Remote Message Queue Starting) support (ETRN keyword).
IPv6 support.
LMTP support.
Support for multiple accounts.
msmtp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
注：如需要对TLS/SSL的支持，还需要安装>=GnuTLS -1.2.0或者>=OpenSSL
最新版本：1.4
修复了使用 --read-recipients 和 --read-envelope-from 选项的问题。
项目主页：http://msmtp.sourceforge.net/