Block client but allow email notifications

[soultwist]

Hi. As the title implies I need some help configuring my rules. I don't even know if this is possible but what I want is for a client (in my case my security cameras) to have blocked internet access but still be able to send email notifications if they detect someone. What I have tried is to allow notification port (587) before block all in rules list. I have checked that the notification itself works in the client by disabling the block all rule so it shouldn't be a problem on the client side. Anyone have any idea of what else I can try?

thanks.

Edit: I figured out how to do it. For it to work I needed to allow dns as well.

thanks anyway.