Renaud Allard wrote:
> I do use this:
> deny
> message = Faked $sender_address_domain.
> log_message = Fake hotmail
> senders = *@hotmail.com : *@msn.com
> condition = ${if match {$sender_host_name}{\Nhotmail.com$\N}{no}{yes}}
>
> It is not 100% safe as many people could put a reverse DNS pointing to
> hotmail, but it is better than nothing.
It is 100% safe. $sender_host_name will only contain a value if the rdns
points back to the same IP. I could set up the rdns of my ip
91.186.24.33 to be foo.hotmail.com, but I couldn't create an A record
pointing foo.hotmail.com back to 91.186.24.33.
Mike
