We frequently have to send email fanouts to large lists. When we do our Internet access is lost for hours because our Exchange 2007 SP1 server is using all of the available outbound bandwidth. Our firewall is a PIX 515 v8.0(2) with ASDM v6.0(2).
I have tried giving tcp/80 priority and I have tried throttling tcp/25 in the PIX but neither seemed to work. Can someone give me step by step instructions on how to allow http/https traffic through the firewall when these fanouts are happening? Please provide instructions for use with ASDM. I am not a command line person.
If someone can tell me how to limit bandwidth usage in Exchange that would work too.