How to restrict an email account from sending emails outside domain ?

[Rohan Bhajekar]

I am trying to create a filter where 1 email account is not permitted to send emails outside of its domain. I have tried following script but it has some loopholes.

if $sender_address is "[email protected]"
and ("$h_to:, $h_cc:, $h_bcc:" does not contain "@domain.com")
then
fail text "Sorry one or more of your email recipients is not allowed. Please contact your System Administrator."
finish
endif

Loophole is if i include any other email recipient in to, cc or bcc along with a user from domain.com then this filter fall apart and doesn't work.
Ex: my email message contains following users

to: [email protected]
cc: [email protected]; [email protected]

is there a workaround which i can try ?

Your help is much appreciated.
TIA

 

[cPanelAaronH]

Hey there,

There is a similar forum post here, Restrict certain email accounts to send email within domain

Can you review this and let us know if you continue to have issues with your filter?

 

[keat63]

Cpanel filters only work on inbound mail.

 

[Rohan Bhajekar]

Hey there,

There is a similar forum post here, Restrict certain email accounts to send email within domain

Can you review this and let us know if you continue to have issues with your filter?

Hello Aaron,

I checked all mentioned posts but unfortunately they do not satisfy my requirement. Can you please suggest something which would work for my requirement ?

 

[Rohan Bhajekar]

Cpanel filters only work on inbound mail.

Hi, that is not true they do work on outbound emails as well, in past had created an auto-bcc rule for a client on outbound emails