Hi,
I think there are two different issues: a) As stated by others, the mail SERVER is NOT required to have an MX record (seldomly will!) and is not required to be referenced in the domain's MX record (in case it's an "outbound" server only). b) However, I reject mails from domains that don't have ANY MX or A records. If I can't respond to a domain by mail, then I certainly don't want their mail. Never had a false positive in all these years. Example: @ A 200.200.200.200 @ MX 10 incoming.domain.com Incoming A 200.200.200.201 Outgoing A 200.200.200.202 It's perfectly fine for you to receive mail from "Outgoing.domain.com", even if there is no MX record for "Outgoing" and even if "outgoing.domain.com" is not referenced in the domains MX record. However, if the two "@" records were missing - THEN this domain cannot be reached by email and I would refuse any mail from any "domain.com". Best Regards, Andy From: supp...@declude.com [mailto:supp...@declude.com] On Behalf Of Harry vanderzand Sent: Tuesday, February 03, 2009 10:28 AM To: declude.junkmail@declude.com Subject: RE: [Declude.JunkMail] DNS lookup fail, yet e-mail passes spam tests Sorry but I am not sure what you mean by outbound in the sample below. I also do not know what specific test should be triggered other than something should be. Here I have mail coming in from a domain. DNS lookup on their MX record fails. Is that not a big flag that this is likely Spam? Maybe I am misunderstanding something here. In the sample below we got mail from an orderlinenews address and the MX record does not exist Thank you Harry Vanderzand Intown Internet 117 Ruskview Road Kitchener, ON, N2M 4S1 519-741-1222 --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to imail...@declude.com, and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
