Exchange – Event ID 205 and Event ID 16025
KB ID 0001251 Problem At a client this week, they were having a LOT of mail flow problems. Looking at the queue viewer, I could see that all their mail was sat in queues waiting to go into their mails stores. There was a queue for each mail store, and the error on each was “451 4.4.0 DNS query failed Exchange Server error in message queue”. Looking in the Application log it was full of Event ID 205, and 16025 Errors...