Re: [Exim] whitelisting a dynamic host

On Mon, Dec 15, 2003 at 08:53:30AM -0800, Rossz Vamos-Wentworth said:
> I want to start blocking dynamic ip addresses since they have become
> such a big source of spam. However, I have one friend who's mail
> server is stuck on a dynamic ip address and I don't wish to block
> him. Is there a simple and secure method to allow his mail server
> through without opening up a big hole?

There are a few options...

* Use SMTP AUTH
* Whitelist by sender HELO or email address
* Have him use his ISP's mail server because he is going to run into
this problem with more and more sites