Block all outgoing emails and only allow specific addresses?

Hi @dabihsss

To clarify you want to do the following:

Block all PHP mail and block nobody from sending mail for all accounts except those you specify?

- Because php mail is allowed through the php.ini for that specific php version you'd need to disallow mail and sendmail in disable_functions:

Code:

disable_functions = "mail,sendmail" 

The problem with this would be that it's global and would affect all users unless you added a php.ini file for each user disabling this except for the ones you'd like to allow


-For disallowing the nobody user from sending mail you can go to WHM>>Server Configuration>>Tweak Settings and enable the following setting:

Prevent “nobody” from sending mail
Prevent the user “nobody” from sending out mail to remote addresses

This would be a global modification as well


-The following post discusses how to block specific domains from sending mail all together which might be useful to you as well:

Blocking all cPanel users from emailing specific domains/email accounts

Thank you,

 

Hello,


While the link I provided may still be useful in terms of the how they get blocked. If you're attempting to build a plugin you might want to look at the following:

Guide to cPanel Plugins - Developer Documentation - cPanel Documentation

Guide to cPanel Plugins - Add Plugins to Version 11.44 and Later - Developer Documentation - cPanel Documentation

How to create a Plugin (WHM & cPanel)

For the actual blocking of outbound mail there's also:

Exim Filter To block Outgoing Email

How to Customize the Exim System Filter File - cPanel Knowledge Base - cPanel Documentation


Thank you,