We have an Exchange server 2003 SP2, users cannot retrieve email from the server.
The information store was full, reached the 18GB limit. We expanded the data base, check for consistensy issues, and defragmented. Everithing is clean but users can not get their email.
We check the event viewer on the server and found under application POP3SVC error with a red X (Error 0x8004050a occurred while rendering message 0005-0000002b040f for download for user email@example.com. ), Event ID 3014 Server activeSync error (The Exchange mailbox Server: [server name.domain.com] has reached its timeout threshold. The mailbox server will be protected from new requests for  seconds. ), and Server ActiveSync warning ID 3007 (Exchange mailbox Server response timeout: Server: [server name.domain.com] User: [firstname.lastname@example.org]. Exchange ActiveSync Server failed to communicate with the Exchange mailbox server in a timely manner. Verify that the Exchange mailbox Server is working correctly and is not overloaded. )