Experiencing an exception stating "User is authenticated but not connected" when attempting to access email via IMAP using the JavaMail API
Experiencing the "User is authenticated but not connected" exception while attempting to access email via IMAP using the JavaMail API (com.sun.mail:javax.mail:1.6.2). This exception occurs in the following scenarios:
Frequent opening of folders using folder.open(Folder.READ_WRITE)
.
Listing all folders using store.list()
.
Making multiple requests to search for messages within the same folder.
Making multiple requests to move emails.
Here's the exception log for one of the cases stated above:
Caused by: com.sun.mail.iap.BadCommandException: R3 BAD User is authenticated but not connected.
2023-10-16T07:33:42.104108Z | at com.sun.mail.iap.Protocol.handleResult(Protocol.java:439) ~[doc_jar_47636534-e247-4ed7-8f36-4f219ab107b4.jar:?]
2023-10-16T07:33:42.104713Z | at com.sun.mail.imap.protocol.IMAPProtocol.select(IMAPProtocol.java:1252) ~[doc_jar_47636534-e247-4ed7-8f36-4f219ab107b4.jar:?]
2023-10-16T07:33:42.105441Z | at com.sun.mail.imap.IMAPFolder.open(IMAPFolder.java:1058) ~[doc_jar_47636534-e247-4ed7-8f36-4f219ab107b4.jar:?]
2023-10-16T07:33:42.106035Z | ... 15 more
This exception is triggered in scenarios involving frequent folder operations and may indicate issues with connection management, such as exceeding server-imposed limits, concurrent access, or timing issues.