Reverse DNS entry for sending secure email ?

Hi All,

I'm having problem like the following when I tried to send to

Diagnostic information for administrators:

Generating server: [B]#< #5.0.0 smtp; 554 "Refused. You have no reverse DNS entry. Contact for details."> #SMTP#

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which records should I add into my internal DNS or my ISP DNS server ? MX or PTR for this problem ?

and suppose i already got one service that is running on my one public static IP address:

eg: 25 SMTP and 80 normal website and 443 (OWA, HTTPS, etc...)

do i still need to add the reverse DNS for this server in the public facing DNS ?

Who is Participating?
Chris DentConnect With a Mentor PowerShell DeveloperCommented:

I feel this needs to be clear.

> thanks man, so in this case i shall put PTR instead of PTR ??


You should put; this needs to match up to the name used by your mail server.

Expect this change to take 24 hours to take effect. Your ISP has a value set for that record right now (other people will remember it for 24 hours).

You need to contact your ISP.  Your send connector and ptr record shoudl be the same
jjozAuthor Commented:
thanks for the reply man, since i only have one public IP address with many CNAME, shouldI create just one PTR records describing into my public IP address ?
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Yes have the ISP create one PTR record.

The correct record shoudl be   IN  PTR    where the x's are your current IP reversed.
man.. I keep misspelling SHOULD*   sheesh
jjozAuthor Commented:
thanks man, so in this case i shall put PTR instead of PTR ??

Thanks for the reply man.
Mohammad Ishtyaq KhatriConnect With a Mentor Commented:
Confirm your IP with the ISP & also chek weather you ip is in blacklist..?

getzjdConnect With a Mentor Commented:
telnet to your server on port 25 and that should be your mx record/PTR record name... assuming it was setup correctly
jjozAuthor Commented:
Thanks Chris
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