Capability utf8 accept Option

Introduced in release: 8.1

The  IMAP option, when set to   (the default), allows an IMAP client to enable use of UTF-8 mailbox names, quoted strings, and messages. See RFC 6855 IMAP Support for UTF-8 for more details.

Note that whether or not this is explicitly enabled by a client, the message store is presently liberal about allowing UTF-8 in the protocol and email messages with UTF-8 headers into the message store. The primary behavior difference when a client ENABLEs this extension is to disallow use of the modified-UTF-7 mailbox naming convention in the IMAP session and convert all mailboxes to UTF-8 when performing IMAP LIST operations.

The default value is: 1

See also:
 * IMAP options