Have an SBS 2003 server utilising pop3 connector to retrieve mail from ISP host and receiving event ID 1023 for any attempts after the 4th simultaneous connection. Upgrade to new Twin Quad Core server from previous Twin Dual Core server has caused the issue. It appears that pop3 connector attempts to establish a thread per processor (Core) and the ISP host has a limit of 4 concurrent connections. Where the previous server attempted and downloaded 4 concurrent email accounts the new server is now attempting to download 8 concurrent email address at the same time with the last four failing.
Is there a method to limit the concurrent (simultaneous) connections from the pop3 connector in SBS 2003 ???
Please do not suggest migrating away from pop3 as this provides a satisfactory contingency for problems. eg: in the past two months the entire state was without phone or internet access for 14 hours and resulting from this 1 server had no internet access for the better part of a week whilst the phone lines were repaired.
I wont even start on the continual power outages in some cases in excess of 12 hours also.