I am using "Sendmail Server" with "squirrelmail webmail" service. This is my bulk mail server,having WAN IP Address & DNS Name Registration.

I am using "phplist" to execute Bulk mail messages through "mailing list" system.

I am able to send 100-200 messages at a time & all messages were sent successfully.

Now, the problem is :- I have made a mailing list,which contains approx 3000 Messages. Already i executed mails,but I am getting a common error message in my inbox.

The Message information is as given below.

The original message was received at Wed, 18 Mar 2009 17:56:17 +0530
from localhost.localdomain [127.0.0.1]

----- Transcript of session follows -----
451 startec.com: Name server timeout
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old

Each & Every Message is having same words.So,it may possible that I need some modifications in my "sendmail server"

Also check below listed messages to get more information.

The original message was received at Wed, 18 Mar 2009 22:43:58 +0530
from localhost.localdomain [127.0.0.1]

----- The following addresses had permanent fatal errors -----
<rajivgupta@not.com>
(reason: 550-5.1.1 The email account that you tried to reach does not exist.
Please try)

----- Transcript of session follows -----
... while talking to aspmx.l.google.com.:
>>> DATA
<<< 550-5.1.1 The email account that you tried to reach does not exist. Please try
<<< 550-5.1.1 double-checking the recipient's email address for typos or
<<< 550-5.1.1 unnecessary spaces. Learn more at
<<< 550 5.1.1 http://mail.google.com/support/bin/a...py?answer=6596 14si360927tim.29
550 5.1.1 <rajivgupta@not.com>... User unknown
<<< 503 5.5.1 RCPT first. 14si360927tim.29


Another Message

The original message was received at Wed, 18 Mar 2009 16:50:21 +0530
from localhost.localdomain [127.0.0.1]

----- The following addresses had permanent fatal errors -----
<myprovidence@mindspring.com>
(reason: 550 550 Dynamic/zombied/spam IPs blocked. Write
blockedbyearthlink@abuse.earthlink.net)

----- Transcript of session follows -----
... while talking to mx3.mindspring.com.:
>>> MAIL From:<apache@newssocia.org> SIZE=2224
<<< 550 550 Dynamic/zombied/spam IPs blocked. Write
blockedbyearthlink@abuse.earthlink.net
554 5.0.0 Service unavailable


Please respond if anyone is having proper answer.

Waiting.

Okay, so you have three issues.

1. "451 startec.com: Name server timeout"

Their server did not respond. This is a non-issue. Their server isn't responding, you can't send mail to them.

2. <rajivgupta@not.com> (reason: 550-5.1.1 The email account that you tried to reach does not exist. Please try)

The email address is wrong. It says so right in the error message.

3. <myprovidence@mindspring.com> (reason: 550 550 Dynamic/zombied/spam IPs blocked. Write [email]blockedbyearthlink@abuse.earthlink.net

You've been blocked for spamming. So don't send spam. If you think this is wrong, take it up with Earthlink as per the error message.



All these issues tell you exactly what the problem in the error message. Please just read your delivery-status-notifications (DSN) carefully and you can easily address all these issues.


- Arch

Thanks for your genuine information. I will read my DSN carefully. I was thinking that my mail server is behaving in a wrong manner.

!!!!!!