Sending email on linux using SSMTP.
Edit ~/.muttrc for each user as appropriate (not that $HOSTNAME does not seem to be set with cron sending)
set sendmail="/usr/sbin/ssmtp" #set from = $USER@$HOSTNAME #set from = username@HOSTNAME_OR_ALIAS.domain set realname="juckins@lightning"
If you get an error like "Cannot open mailhub:25" you need to add the problematic user to the "mail" group. See information on setting permissions here:
Update 26 January 2014:
Gmail stopped sending, found information at http://serverfault.com/questions/560728/linux-ssmtp-error-cannot-open-smtp-gmail-com587
Add this line to /etc/ssmtp/ssmtp.conf
Update 4 April 2015:
Gmail stopped sending, couldn't connect to smtp server per /var/log/maillog errors. It suddenly started working again. Used "swaks" to troubleshoot per http://nekhbet.com/ssmtp_yahoo.shtml and saw this error:
IO::Socket::INET6: connect: Network is unreachable
Seemed to be an IPv6 problem.
Additional info for CentOS6:
4 November 2015
Gmail stopped working.
Try a PHP or Perl solution, but does it require SSMTP or MSMTP?
Final answer was to configure Gmail as a Relay