IMAP connection security (selection)
Specify the connection security to IMAP servers
ID: ImapSecureOptionsType
Automatic IMAP connection security
The security mechanism is determined automatically while establishing the connection.
ID: ImapSecureOptionsType.auto
No connection security
IMAP is used without a secure connection
ID: ImapSecureOptionsType.none
IMAP with SSL
IMAP connection uses SSL
ID: ImapSecureOptionsType.ssl
IMAP with STARTTLS
IMAP connection uses STARTTLS
ID: ImapSecureOptionsType.tls
IMAP with optional STARTTLS
IMAP connection uses STARTTLS, if available
ID: ImapSecureOptionsType.tlsopt