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Verifying that a valid mail exchanger (MX) exists for a domain when receiving mail from that domain is a fairly common thing to do. That is, if an e-mail comin
by jlgaddis 10y ago
Verifying that a valid mail exchanger (MX) exists for a domain when receiving mail from that domain is a fairly common thing to do.
That is, if an e-mail coming into my server purports to be from example.com, checking for the existence of a valid MX for example.com is a common "anti-spam" measure. If example.com can not or will not accept mail, rejecting (or marking as spam) the incoming message is considered acceptable.
- ChefDenominator 10y agoThe DMARC problem is not related to MX records.
- jlgaddis 10y agoSorry, I was referring to "... for domains not really requiring a mail server for inbound mail ..." If example.com sends out mail but can't or won't receive incoming mail, then some mail servers may reject those outbound messages.
- ChefDenominator 10y agoYou read past the part where I described receiving mails. It sounds like you have never used the service, so have no idea what I'm talking about, so have no idea what you're talking about.