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DNS question regarding MX records

G

Gantry

Member
Having trouble with a certain percentage of emails bouncing for a new domain. I do not have any more info just yet, but I noticed that this domain's MX record is an actual IP address. Is this legal? I though MX records had to point to a hostname...

Thanks in advance for the help
 
MX should point to a hostname. If not, some sites will bounce mail because the reverse lookup fails.
 
Hmmm, what percentage of sites bounce mails because of failed reverse lookups? I ask because a had a personal domain with no reverse-dns records for a very long time and never had any problems with bounced emails. IRC and FTP yes, but not email... Not saying it cannot be true, but given that a large % of emails for this domain are bouncing, I don't think it would be because of reverse-lookups failing...
 
Don't know the percentage but I'm sure it's higher today than in the past with all the spam going on these days.
 
I know that exchange by default will only deliver the email if the reverse lookup is good. I'd assume some others do this as well.
 
We use CommuniGate Pro and it does would also drop the mail if the MX did not resolve to a hostname... If it does resolve to a hostname it then does some further checks to!
 
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