Hi, We add before ABC.net SMTP domain in our Exchange Organization but today we remove it by using Internet Mail Wizard and remove from DNS but still the users in organization can receive email but they report that can not send email to ABC.net I have one message in DNS Events that said: Event Type: Warning Event Source: DNS Event Category: None Event ID: 4521 Date: 4/25/2011 Time: 1:48:44 PM User: N/A Computer: mycompanyDC1 Description: The DNS server encountered error 32 attempting to load zone ABC.net from Active Directory. The DNS server will attempt to load this zone again on the next timeout cycle. This can be caused by high Active Directory load and may be a transient condition. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. I found there record ABC.net still in DNS but i delete also, I restart the DC server and try to send email to ABC.net but failed. In my company try to Telnet ABC.net and failed but if i telnet ABC.net from any where it work. How can fix this issue?

I want just how to follow up my email where are they. Because i try to found them in the exchange server there are nothing i mean when view the system manager i found nothing in the queue. in case check in outlook sent items there are email stay but i could not found any error come back to my email and the people they still waiting to receive e-mails from us. any comment??

Hi, Which exchange edition do you use? If you use Exchange 2003, the mail can be tracked by using Message Tracking Center http://www.msexchange.org/tutorials/Exchange-2003-Message-Tracking-Logging.html If Exchange 2007 or 2010, enable the Message Tracking http://technet.microsoft.com/en-us/library/aa997984.aspx and then you can search the message tracking log through Get-MessageTrackingLog http://technet.microsoft.com/en-us/library/bb124926(EXCHG.80).aspx In your first question about a DNS event warming HKLM\Software\microsoft\Windows NT\CurrentVersion\DNS Server\zones Delete the key with the ABC zone name. try to check if the ABC.net is point to the correct IP address. you can use nslookup. Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.