Restricting outgoing SMTP to root, exim, and mailman Conflicts?


Active Member
Jun 3, 2013
St Paul, MN
cPanel Access Level
Root Administrator
Hello, if I have several WordPress users on my server, as well as other custom PHP websites that run cron job nightly emails, etc. Do I need to be concerned that if I enable "Restrict outgoing SMTP to root, exim, and mailman", that people's websites will stop working? Things such as contact forms, lead generation forms, reservations notification emails, etc.?

Also, would prohibiting emails from the nobody user also cause problems for the above?

Thanks in advance for any help!


Staff member
Apr 11, 2011
Hello :)

Ideally, you should configure your scripts to send out using SMTP authentication if possible. Most applications utilize Exim's sendmail binary for sending emails, so they should still be able to send emails when "SMTP Restrictions" are enabled. You should not encounter issues blocking the "nobody" user from sending out emails as long as you are using suPHP as your PHP handler. The following document should be helpful to you:

Prevent Email Abuse

Thank you.