Release 6.20.0: Property to enable/disable the use of the STARTTLS command (if supported by IMAP server) to switch the connection to a TLS-protected connection.

[changerequest]

Introduced new property com.openexchange.imap.enableTls to enable/disable the use of the STARTTLS command (if supported by IMAP server) to switch the connection to a TLS-protected connection.

By default the value is true, meaning to allow a TLS-protected connection if supported.