Undeleteflag Option

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Introduced in release: 8.0.1

When the undeleteflag Message Store boolean option is set, it causes imapd to set an explicit $undeleted message flag when the \Deleted flag is removed. This feature allows clients to detect when a previously deleted message is no longer deleted, which can be helpful when providing a gateway to a protocol that has to treat this scenario as if a new message arrived. The $undeleted message flag has no additional special semantics and may be set or cleared by clients if the IMAP ACL on the mailbox permits flag changes.

The default value is: 0

See also: