Disable email forwarding

[go2bar]

In order to avoid spoofing, how can I create the rules that block the forward email from email server? That means block the out email domain that not belongs to the domain that I have entered.

 

[steven99]

So to confirm, you're talking about example@gmail.com sending to bob@example.com, where example.com is hosted by you. Bob@example.com forwards to bob@gmail.com. And you want to stop the forward from bob@example.com to bob@gmail.com. And more exactly, if the from address is not your domain, you don't want it to go out. Is that correct? If so, I believe I covered that in this post. Basically, you do a who object that uses a regex that checks if the domain is not the allowed domain and if so, blocks it. This is really only feasible for a small set of domains or if like you're using the API .

Another option is to up SPF rules to make them always hit spam thresholds but that would affect both in and out filtering.

 

[go2bar]

Dear Steven,
if the from address is not your domain, you don't want it to go out. Is that correct? I
Yes. Thats exactly what I want to do.

uses a regex that checks if the domain is not the allowed domain and if so
>> Do you have such syntax?

Direction -> Out

Many thanks.

 

[steven99]

uses a regex that checks if the domain is not the allowed domain and if so
>> Do you have such syntax?

I give it in that post i mentioned but will post here also:

((?!example.com).)*$

 

[go2bar]

Thanks