Block all outgoing emails and only allow specific addresses?

[dabihsss]

How to block all emails sent from PHP scripts and nobody user and set up file which contains allowed from email addresses which I manually specify?

is there any way to do that like exim_blacklist filter

 

[24x7server]

Hi,

The same kind of discussion can be seen in the below link of the cPanel forum.. Please take a look at it..

Exim Blacklist Domains Issue

 

[dabihsss]

Hi,

The same kind of discussion can be seen in the below link of the cPanel forum.. Please take a look at it..

Exim Blacklist Domains Issue

I am looking for a solution to stop outgoing spam from scripts, not the incoming spam.

check for a list of allowed email ids before sending emails, if not in list discard the message.

 

[cPanelLauren]

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:

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,

 

[dabihsss]

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:

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,

I am looking for a solution like the following

"Sending emails from PHP/Application is disabled globally and there will be a plugin button in cpanel, through that cpanel users can specify/whitelist single or multiple email address that can send mail from script"

I have seen the above feature with resellerclub's cpanel servers (i am trying to build a plugin like that).

 

[cPanelLauren]

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,