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IMAP/POP

Articles about migration errors when performing an IMAP/POP Mailbox migration.

  • System I/O error
  • The handshake failed due to an unexpected packet format
  • This message is too big and can not be appended
  • UID FETCH error: Can't fetch that data
  • Unable to append message to folder
  • Unable to open this mailbox
  • Unable to return a highest UID
  • Unknown namespace
  • What do I do if my IMAP migration reports the error: Plaintext authentication disallowed on non-secure (SSL/TLS) connections?
  • [ALERT] Message too large IMAP
  • [ALREADYEXISTS]
  • [AUTHENTICATIONFAILED] (#MBR1212) Incorrect username or password - Error
  • [AUTHORIZATIONFAILED] Account is blocked - Error
  • [SERVERBUG] Internal error occurred
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