mailsend is a simple command line program to send mail via SMTP protocol. It can send a piece of alertmail from a program in a networked Windows machine. It's feature-filled, cross-platform, free and open source, and does not use any config file.
Free and light e-mailalert client. Multi-profile and multi-account support. Support for IMAP and IMAPS. Built-in settings for the most popular e-mail services (1&1, AOL, GMail, Hotmail, MobileMe, Yahoo! Mail, etc).
It's a supporting service for Nagios, which enables the Nagios Admin {& Contact.cfg's Moderator} to ACK any Alert/Notification mailed to them by just forwarding that mail to a GMail-id owned by them.
One ID can be used for multiple Nagios Servers.
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