Ubuntu – Ssmtp Cannot open mail.server.com:25

12.04emailssmtp

I am trying to configure ssmtp on our Ubuntu 12.04 server. However I had no luck so far. My ssmtp.conf looks like this:

root=me@server.com
mailhub=mail.server.com:25
rewriteDomain=
hostname=hostname.server.com
AuthUser=me
AuthPass=mypassword
UseTLS=YES
FromLineOverride=YES

When I try to send mails I get ssmtp: Cannot open mailhub:25. When I use sudo the error message reads a little different ssmtp: Cannot open mail.server.com:25
The server should normally accept SMTP on port 25 and I can contact it with telnet mail.server.com 25. Any ideas would be greatly appreciated.

Best Answer

  • Ok I figured it out... I had to use UseSTARTTLS=YES instead of UseTLS=YES. Also I had to enter root:me@server.com:mail.server.com:25in /etc/ssmtp/revaliases. Hope this helps others as well.

    If you want to use other user accounts than root, you will have to add those to /etc/ssmtp/revaliases as well and add them to the 'mail' group.

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