We have some applications and a CRM system that use our Exchange 2010 servers to relay smtp emails.
When they were pointing to Exch 2003, there were no delays, but now they point to Exchange 2010 there is a 5 second delay per email.
I have changed the receive connector maxdelay to 0 but looks like the issue is still happening?
We have a DAG in place and Sophos AV on the servers.
If there anything else I can change or tests to perform to resolve this?
Outlook is fine.