POP Service is wacky

[James Bayer]

I have Windows Server 2003 Standard and we are usng the POP mail services. I have set up accounts, and we are able to access the accounts and send mail just fine. My issue is that we are having trouble sending maill to everybody. IThere are certin addresses that it won't send mail to (hotmail, worldnet, yahoo, ect). Is there a setting I need to adjust or something?

JD Bayer

[Igor Karasik]

Do you receive any errors?
Many mail servers require reverse lookup records (PTR) defined for sender server.
Maybe also your IP has been blacklisted as an open relay or spam sender.
Check also that your DNS server can do resolution for MX record of hotmail, worldnet, yahoo,....

[James Bayer]

This is the error I get...

Your message did not reach some or all of the intended recipients.

Subject: Test
Sent: 10/24/2005 4:58 PM

The following recipient(s) could not be reached:

'jamesdbayer@hotmail.com' on 10/24/2005 4:58 PM
550 5.7.1 Unable to relay for jamesdbayer@hotmail.com

[Igor Karasik]

Ok, start with adding back resolving to your mail server IP
You cannot setup your reverse DNS record yourself. You need to ask this to your ISP.
The second option -- use SMTP forwarding to send mail through your ISP.

[Igor Karasik]

Check also your IP is not in blacklist
Multi-RBL check
http://rbls.org/

[James Bayer]

So this could be an ISP issue rather that or server. Thanks.

JD

[Prashant (I am Back)]

Hi,

try to checl with the reverse DNS Good option.
Where as are you able to send mail to any out side email address. IF not then check with internet mail is activated in exh 2003(If you are using the same).

REgards,
Prashant S.

[James Bayer]

I have to make a correction. I am NOT able to send email to ANY outside mailbox. All I have is internal mail services. I did talk to our ISP, and we are set up with reverse DNS look up. Any ideas?

JD

[Igor Karasik]

Ok, It makes sense
Try to do steps from: http://support.microsoft.com/?id=324285#XSLTH3207121122120121120120