On Fri, 1 Mar 2019 11:37:18 -0500 Mike Marynowski wrote: > Looking for an A record on what - just the email address domain or > the chain of parent domains as well? If the latter, well a lack of A > record will cause this to fail so it's kind of embedded in.
Sure, but had it turned-out that most of these domains didn't have the A record necessary for your HTTP test, it wouldn't have been worth doing anything more complicated. > Quick sampling of 10 emails: 8 of them have valid A records on the > email domain. I presumed SpamAssassin was already doing simple checks > like that. You don't need an A record for email. The last time I looked it just tests that there's enough DNS for a bounce to be received, so an A or MX for the sender domain.
