Re: Greylisting and whitelisting SMTP client domains

Victor Duchovni wrote:

> > To clearify, whitelisting the sender domain works perfectly, but I
> > also would like to whitelist some SMTP client domains. Right now I
> > have:
> >
>
> This is not possible in a semantically safe way. What happens when the
> resolution of the client's name fails? Should their mail be blocked with
> a 5XX code because they hit the blacklist after accidentally not being
> found on the whitelist? How do you avoid erroneous 5XX rejects?


In the context of bypassing greylisting, that scenario wouldn't arise.


Matt