- This is a possible corruption of the pop3uidl file. Close the Internet connection and all programs. Search for the file ‘pop3uidl and delete it. Reconnect and it should work
- Repeat step 1 with a reboot before you check your mail again
- You may have a corrupt or a very large file attachment on the mail server. Large file attachments, mail that are missing headers or mail that do not conform to the mail RFC’s can cause this
