Hello, I have an Exchange 2007 (Hub Transport Role) question. We have a problem with e-mail delivery regarding e-mail blasting. Is there a way to limit the queue to only process a certain amount of messages at once. The problem is that someone delivered 1200 e-mails at once (the user is sending one at a time with an automated process in Outlook - one e-mail address per message and a ClickYes program). This process queued up all 1200 recipients at once and bogged down DNS/WINS/e-mail delivery. Would I need to set the MaxOutboundConnections property for TransportServer (our settings below)? Our current EnvelopeSize is 50. Thank you for any assistance. :) PS C:\> get-transportserver | select MaxOutboundConnections,MaxPerDomainOutbound Connections,Identity MaxOutboundConnections MaxPerDomainOutboundConnec Identity tions ---------------------- -------------------------- -------- 1000 20 CLEHBHTS01 unlimited unlimited clehbets01

Install one more transport server.Or install network load balancing. -bpara

1200 messages isnt really that large. Are your hub transports properly sized?

Hello, Thank you for the replies. I'm not sure what you mean is hub transport properly sized. I do know that when the Process ran for client's Outlook, it queued up 1200 individual messages at once and killed DNS/WINS/mail delivery company wide temporarily. Some people reported problems logging in onto the DOMAIN as well. I want to know how I can fix this. As mentioned before, we do regular billing and we use a program that transmits billing invoices via Outlook (1 e-mail address per envelope). The billing software utilizes the ClickYes program to allow access to send. Any solution to minimize how much e-mail in the queue can process at one time? I think what happened is that the queue processed all 1200 e-mails at once causing DNS/WINS to fail and slow down regular e-mail delivery.

Yea, but that shouldnt happen. :) Is this a multi-role server? Is Exchange installed on a DC?