Milter-greylist

Emmanuel Dreyfus <manu@...> writes:

> Hi

Hello,

> So, what's the most-wanted-but-easy-to-implement features? On the to do 
> list, I have:
> 1) DNS support in greylist.conf
> The idea is to whitelist an IP address or a domain. Example:
> domain /.*netbsd\.org/
>
> This could be implemented by doing a gethostbyaddr() on the sender IP 
> address and checking the enaswers (primary address and aliases) against
> the regex. That does not look very complicated, but I suspect we can run 
> into DNS resolver thread-safety and performance slowdown because of DNS 
> lookups. Maybe this should be dealt after 1.4

Imho this could end into another issue if for some reason reverse resolution
is broken for a while (NXDOMAIN ?) how would whitelist code react then ?

> More ideas? Opinions? Thoughts? 

4) Per (virtual-)domain config ?