Nice to know Posterous checks SPF records amongst other checks! Do you also check IN SPF records or just IN TXT? From my experience, the actual SPF record type is seldom used. For my personal domain, I only use SPF and do not publish TXT at all -- dnscog.com thinks I don't have SPF record published, oh the irony of them (Dyn Inc) being the DNS force and all.
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SPF is already baked in. You can't set up an email account without understanding the ins and outs of that stuff. It is one part of an arsenal.
Nice to know Posterous checks SPF records amongst other checks! Do you also check IN SPF records or just IN TXT? From my experience, the actual SPF record type is seldom used. For my personal domain, I only use SPF and do not publish TXT at all -- dnscog.com thinks I don't have SPF record published, oh the irony of them (Dyn Inc) being the DNS force and all.