Relay SMTP port 2525

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Nethserver uses templates to write the config files. That’s the reason your changes are overwritten on reboot or config change.

http://docs.nethserver.org/projects/nethserver-devel/en/v7/templates.html

Do you really want to REPLACE the port? Why not using a relay port like @pagaille recommended and @saitobenkei has explained?

Sorry, I misunderstood the whole thing :grin:

Just add a custom template to /etc/e-smith/templates-custom/etc/postfix/master.cf/41smtpd_custom with following content:

#
# 41smtpd_custom -- custom public smtp server on port 8025
#

8025      inet  n       -       n       -       { $connections_limit > 0 ? $connections_limit: '-' }       smtpd
{
    $OUT = join("\n", map { "  -o " . $_ } @smtpd_public_options);
}

Now you have port 8025 open additionally to port 25. I don’t recommend a replacement of the port as it implies a replacement of the 40smtpd_custom template which may lead to troubles with updates.

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