Sync problems with case-sensitive special folders (INBOX)

[manusa]

Description

• RFC states special case for INBOX being a special case-insensitive named mailbox
• Following exception is raised when syncing a Microsoft Outlook (Office365) account into a Dovecot (Maildir based) account

  javax.mail.MessagingException: Couldn't create folder: Inbox in target server.
  at com.marcnuri.mnimapsync.store.StoreCopier.copySourceFolder(StoreCopier.java:105)
  at com.marcnuri.mnimapsync.store.StoreCopier.copySourceFolder(StoreCopier.java:115)
  at com.marcnuri.mnimapsync.store.StoreCopier.copy(StoreCopier.java:75)
  at com.marcnuri.mnimapsync.MNIMAPSync.copySourceToTarget(MNIMAPSync.java:104)
  at com.marcnuri.mnimapsync.MNIMAPSync.sync(MNIMAPSync.java:126)
  at com.marcnuri.mnimapsync.MNIMAPSync.main(MNIMAPSync.java:155)

• In order to fix, check for target INBOX mailbox should be case-insensitive (i.e. target Inbox folder should not be created if there already is an INBOX present)

  See

• RFC 3501 - 5.1.Mailbox Naming -> https://tools.ietf.org/html/rfc3501#page-18