block domain extensions

[Rene Chirivi]

Hi,

How i can block .us domain extension?

i need to block mails with this extension,
I try to block the complete domain, but every day the domain chage: For example

domain1.us
any.domain1.us
domain2.us
domain3.us
domain4.us
and etc.

Thanks for your help

 

[heutger]

RegEx in the rules should do the job or postfix checks via customization