Dear All, I have installed exchange server 2007 and enabled the send and receiving external mails through an edge transport server which is in DMZ.Every thing was working fine till yesterday.But since yesterday We are facing a problem in sending external emails from our exchange server .But we are able to get external emails.While sending external emails it is queing up in the Exchange server .(It is not relaying to the edge transport server which is in the DMZ).But when we restart the exchange server,the queue disappears and it will relay the mails through the edge transport server to outside .I cannot find a ny errors in the event viewer except that the powershell log is getting full. In short we need to restart the exchange server every time to send the external mails!!But recieving external mails is fine...What could be the problem?I think there is no problem in the exchange services ,because all services are started.I have reinstalled the send and recieve connector in the edge transport server&exchange server.But the result is the same... Please help... Thnaks&Regards Sreejith

Hmm, you might need to check your firewalls? Deli