deny domain smtp

[dwoodard3950]

How do I deny all domains but my own as valid send to addresses? I was looking at doing this with transport_maps, but the syntax to deny all is not compatible with the PMG entry form.

Method with direct entry in /etc/postfix/transport

example.com :
.example.com :
* error: Only allowing one domain

Recommended method for this via PMG?

 

[steven99]

Mail filters should be able to do this. Do a who regex object with the regex being:

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

Then do a new mail filter rule for outbound with this who object and the block action object. Now anytime a message tries to go out and example.com isn't the sender, it should block the message .

 

[dwoodard3950]

Thanks! Exactly what I needed.