Thrown when the user mailbox is locked or in-use.
For a list of all members of this type, see PopServerLockedException Members .
Public static (Shared in Visual Basic) members of this type are safe for multithreaded operations. Instance members are not guaranteed to be thread-safe.
The mail boxes are locked when an existing session is open on the POP3 server.
Only one POP3 client can use a POP3 account at a time.
Assembly: OpenPop (in OpenPop.dll)