Suddenly one of our subsite called Room Booking is not sending an initial email alert but it's sending email if the room booking entry is modified. In the Event log of our SP server is the "Event ID 6857 cannot connect to SMTP Host" I've followed the resolution from this Q_25802856.html
and MS Event ID 6857
but still no go. All expected services are running and we don't see any problem in the configuration. Please help
WSS 3.0 Single Server Configuration. Exchange 2003 server.