This version contains the patch from Enoch Wu to allow sending to mail agents which don't listen on port 25. For example, if you're using a ssh tunnel to the mail agent of your employer: ssh -L 2525:mail.employer.com:25 ... then you can change /etc/ssmtp/ssmtp.conf to contain the following mailhub entry now: mailhub=localhost:2525 To complete the installation you'll have to call /usr/bin/ssmtp-config It asks several questions. - The name of your local system. Please enter the full qualified domain name (FQDN) of your box. - The name of your domain. - The FQDN of the mailhub to which ssmtp shall send mails. - The port number on which the mailhub listens. The result is written to /etc/ssmtp/ssmtp.conf Open /etc/ssmtp/ssmtp.conf and have a look whether everything is ok or not. Especially proove two options: If `rewriteDomain=' is uncommented, ssmtp always rewrites the `From' envelope and the `From:' line so that the FQDN is set to . If the option `FromLineOverride' is set to YES, ssmtp uses the same `From' in the mail envelope as you have written into the `From:' line of your mail. When using mutt as the mail client, add the following line to your $HOME/.muttrc file: set sendmail="/usr/sbin/ssmtp" Please send all mails related to ssmtp for Cygwin or Cygwin in general always to the mailing list mailto:cygwin@cygwin.com. Have fun, Corinna