asked on

sent mail being blocked by rDNS

Hello Experts,

My outbound mail is being blocked by "some" based on a rDNS lookup that shows my internal doamin name. IE: sbs.anydomain.local

The rDNS has been setup to be mail.anydomain.com same as my MX record and the inbound mail is working great...and it's only some of the mail being blocked.

Thanks!

durango099

ASKER

So the question is: How do I change the outbound name?

Thanks!

debuggerau

Might be that the sites are checking your SMTP banner...

Instructions here for setting your SMTP banner..

http://www.amset.info/exchange/dnsconfig.asp

BigRussian63

When you say blocked, do you mean that your outbound emails are being tagged as SPAM or something?

durango099

ASKER

I verified the SMTP Banner, and it is set for mail.anydomain.com and the DNS check button passes.

By blocked, I mean this:

You do not have permission to send to this recipient. For assistance, contact your system administrator.

<srv.anydomain.local #5.7.1 smtp;554 5.7.1 R:DNS - Message sourced from ipxx-xx-xx-xx.z169-154-67.customer.algx.net [xx.xx.xx.xx] not allowed. For assistance: see <http://info.smtp.ucla.edu> or e-mail <consult@ucla.edu>.>

The bounce messages claim that the .local rDNS lookup is invalid...which it is.

debuggerau

try looking at it externally, as it looks like your ISP is providing the DNS for your IP.

http://www.iptools.com/

BigRussian63

Do you have reverse DNS setup by the ISP?

BigRussian63

Whoops, sorry you mentioed it was.

ASKER CERTIFIED SOLUTION

durango099

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