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Linux Miscellaneous Shell

Using sendmail with a Relay Host

It is useful when Docker containers can send e-mail to you in case there is an error condition that needs attention. Here is how to.

Install the sendmail package from your distribution and edit the file /etc/mail/sendmail.mc. Add this line to the end of it:

define('SMART_HOST', '<dns-name-of-your-relay')

Done! Just restart sendmail:

/etc/init.d/sendmail stop
/etc/init.d/sendmail start

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