Help! Mail Delayed - Status 4.4.3 - Only from outside domains

[MGJR]

Any suggestions are really appreciated!!
It seems that for some reason, I cannot get email from the outside into my work domain. I can send and recieve all day long Internal to Internal.. and Internal to External domains work all day long. However, External to Internal gets delayed. No changes were made to the server, DNS seems to be OK. Perhaps there's an NSLOOKUP thing I am missing - Or the MX records need to be updated? But what is weird is that everything was working fine yesterday - and nothing was done??

This the message I recieved in my personal email after I sent a test email to my work's domain:

Final-Recipient: rfc822; me@myworkdomain.com
Action: delayed
Status: 4.4.3
Last-Attempt-Date: Thu, 17 Apr 2003 20:05:28 -0400 (EDT)
Will-Retry-Until: Sat, 19 Apr 2003 15:43:09 -0400 (EDT)

Again - any help is sincerely appreciated!

 

[gizmoxman]

It sure sounds like a DNS problem. Are you hosting your own DNS or are you using your ISP as authoritative for your zones? Maybe ISP made changes. Check using

http://www.checkdns.net

 

[MGJR]

thanks for the link gizmoxman! and yes, we are hosting our own DNS.

 

[kavita11]

This article is useful to troubleshoot all NDR's in exchange 2000

http://support.microsoft.com/default.aspx?scid=kb;en-us;284204

I have the same problem in my exchange server. First the user who sends the email out get a Delayed Delivery Notification and then the mail comes back after a couple of days. I tried the solution in the following link:

http://support.microsoft.com/default.aspx?scid=kb;en-us;262206

But this does not have seemed to solve my problem. I also tried increasing the expiration time limits:

http://support.microsoft.com/default.aspx?scid=kb;en-us;247129.

I am still trying to work on this. If I find anything else I will post it here.

Hope this helps,

Kavita

 

[RoryJMcKenna]

I'm not sure that this will apply here... But I have seen this problem before and this is what it turned out to be...

What are the Queues looking like .... I you have been discovered as an open relay... The Queues will be jammed with tons of messages that ppl are relaying through your server...

If this is the case delete the default smtp virtual server... Create a new one and make sure to allow only internal users to relay through the server...


--Rory--

 

[kavita11]

My queues are empty there are no messages that are pending. I have only this one message that a user is trying to send out which is in status retry. I increased the Expiration time outs so maybe it will go through even if it is delayed.

Any other ideas,

Thanks

Kavita

 

[kavita11]

I just did a check DNS on the domain my user is trying to send to. Some of their MX records do not work ok. They have 4 email servers out of which the first one timed out and said waiting for connection. I know that in Exchange 5.5 in Internet mail service properties --> connections tab --> Specify email by domain. You can specify an IP address and say deliver using this address. Maybe if I do this on my Exchange 2000 server it might help in delivering the message rather than timing out. I dont know how I would do this on Exch 2000. Can anyone help?

thanks,

Kavita