Re: [Exim] Fixing SPF Forward Problem by Reply-to: Hack?

Edgar Lovecraft wrote:

> So see, if SPF requires proper DNS PTR records, why not just start there to
> begin with?

If they use 'ptr'. They can also announce raw IP blocks. People using
'ptr' should have control over their reverse zones.

If you are a small company with less then a full /24 network, you'll
probably not get the reverse zone delegated to one of your servers.

My point was that many companies running mail servers do not have access
to their own reverse zone. Sure, they can pester their ISP. But they
usually have easy access to their forward zone(s), so they can use SPF,
and they don't have to use 'ptr' in their SPF TXT records.

/tom