Help: email-send-command
Tcl 2014 Conference, Portland/OR, US, Nov 10-14
Send your abstracts to tclconference@googlegroups.com by Sep 8.

The "email-send-command" setting:

This is a command to which outbound email content is piped when the
email-send-method is set to "pipe".  The command must extract
recipient, sender, subject, and all other relevant information
from the email header.