We are running Small Business Server 2003, with SQL and Exchange installed. Exchange was running fine for approx. two weeks then suddenly stopped sending receiving mail.
Users can now no longer send externel or internal mail to each other. They just sit in their outbox forever. Running Outlook 2000, with all service packs and office updates installed.
Looked in the Event Log and now see an error that I had not seen before. It says: Initialization of external interface SMTP failed; Error ecVersionMismatch-MAPI_E_VERSION When I click on the more information link it talks about checking the latest service pack is installed, which it is. Then starts on about msExchMaxThreads and msExchMinimumThreads values are set correctly. Thought this must refer to a registry setting but couldn't find any? Where do I find this setting and what are the correct values? It says the default values are 100 and 10.
Or if any other things could be stopping the mail would appreciate knowing.
Some other things you might need to know:
Connected to internet via ADSL router/firewall, which is our DHCP server.
Any further help much appreciated.