SOLVED How to block one email user from sending to certain domains?

[bcadej]

I have several domains on my WHM/cPanel server. These domains have several users (e.g. email addresses).


I would like to block that from one MY email account cannot be send email to certain domains.


Example:

[email protected] – can send email to everybody

[email protected] – can NOT send email to @gmail.com, @hotmail.com, @web.de but can send email to ALL other domains.


I hope you understand my concern.


Thank you for your help.


Best regards,

Bostjan

 

[cPanelLauren]

Hello,


To do this you'd need to set up a custom Exim system filter rule. Documentation on how to use the Exim system filter can be found here:
How to Customize the Exim System Filter File - cPanel Knowledge Base - cPanel Documentation

Thank you,

 

[bcadej]

I don't want to mess up stuff. I'm not experienced script user.

That example shows hot to block receiving mail from [email protected].

What to write to meet my needs.

Block mail TO certain domains FROM one local user – email?

 

[cPanelLauren]

Hello,


I created a test filter using the instructions provided in the link which blocks email from my email user to gmail as an example:

# cat /usr/local/cpanel/etc/exim/sysfilter/options/test
if("$h_to:, $h_cc:, $h_bcc:" contains "gmail.com")
and ("$header_from:" contains "[email protected]")
then fail
endif

Thank you,

 

[bcadej]

If I need to add @hotmail.com, @web.de, do I just copy that if statement and replace domain?

 

[cPanelLauren]

Hello,


I would suggest creating one for each domain/user and naming them accordingly. That way if you run into an issue with one of them or you need to remove one it will be easier to disable/modify.

 

[bcadej]

It doesn’t work.


WHM >> Home >> Service Configuration >> Exim Configuration Manager. In the Basic Editor section, the Filters tab >> Custom Filter: mailinator

There is a yellow exclamation mark >> The setting, filter_mailinator, was not set in the configuration file, so the default has been used.



Where/how to I set this in the configuration file?

 

[cPanelLauren]

Hello,

Can you show me the permissions and rules within your filter file?

stat /usr/local/cpanel/etc/exim/sysfilter/options/filter_mailinator

cat /usr/local/cpanel/etc/exim/sysfilter/options/filter_mailinator

Thank you,

 

[bcadej]

- Removed -

[root@vps ~]# stat /usr/local/cpanel/etc/exim/sysfilter/options/filter_mailinator
stat: cannot stat ‘/usr/local/cpanel/etc/exim/sysfilter/options/filter_mailinator’: No such file or directory

[root@vps ~]# cat /usr/local/cpanel/etc/exim/sysfilter/options/filter_mailinator
cat: /usr/local/cpanel/etc/exim/sysfilter/options/filter_mailinator: No such file or directory

 

[cPanelLauren]

Hello,


Did you create the file as indicated by the documentation? Based on this it doesn't appear to exist. The steps are:

1. Create a file in the /usr/local/cpanel/etc/exim/sysfilter/options/ directory.
2. Within that file, enter your custom filter rules. For example, to block mail from [email protected], add the following rule:
   
   

   if ("$h_from:" contains "[email protected]")
   then fail
   endif

3. Navigate to WHM's Exim Configuration Manager interface (WHM >> Home >> Service Configuration >> Exim Configuration Manager). In the Basic Editor section, select the Filters tab.
4. Disable any undesired filter rules.
5. Click Save.

 

[cPanelLauren]

Hello,

If the filter is just mailinator then the commands to view it should be:

stat /usr/local/cpanel/etc/exim/sysfilter/options/mailinator

cat /usr/local/cpanel/etc/exim/sysfilter/options/mailinator

 

[bcadej]

The striked out is an email.

 

[cPanelLauren]

Hi @bcadej

The bottom of that appears to be cutoff is the final line in that file "endif"?

Can you also run /scripts/buildeximconf and let me know if the issue persists?


Thank you,

 

[bcadej]

I've found the problem.

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

How to create a custom filter rule file


Number 4 says ‘Disable any undesired filter rules.’

In WHM in Filter tab: the new line stated ‘Custom Filter: mailinator’ in the right column ‘on’ was selected and under on default is written.


So the number 4 says ‘Disable any undesired filter rules.’ – I didn’t need to disable any rules so I didn’t do anything.

Also not number 5, which is ‘Click Save.’

Now I've clicked Save.

Now it works.


Thank you.

 

[cPanelLauren]

Hi @bcadej


Thank you, for updating the results, I'm glad you were able to get it working for you.


Thank you,