RFC7505 Means Yes, Your Domain Can Refuse to Handle Mail. Please Leave Us a TXT If You Do.

Reprise from 2021, now also trackerless - https://nxdomain.no/~peter/rfc7505_means_yes_you_can_refuse_to_handle_mail.html #NULLMX #antispam #email # security #SPF #spam #RFC7505 #SMTP (and converting from G's wysiwyg editor droppings is painful fyi)

I've updated my MailPolicyExplainer #PowerShell module. Now, it can evaluate #SPF records recursively, counting how many #DNS lookups all of those "include" tokens consume. Does your SPF record return a PermError? Try the new `-Recurse` parameter and find out!

Of course, it still checks the usual #email things: #DKIM, #DMARC, #BIMI, #DANE, #DNSSEC, #MTASTS, #NullMX records, and #IPv4 and #IPv6 reachability. Version 1.3.0 is now live in #PSGallery and on #GitHub.
https://www.powershellgallery.com/packages/MailPolicyExplainer/1.3.0