Protocols List -> IMAP over STARTTLS

IMAP over STARTTLS ports range, how to block IMAP over STARTTLS in network?

  Protocol:
IMAP over STARTTLS
Support: WFilter zh.4.0, WFilter en.4.0, WFilter Free 1.0
  Author: imfirewall  
      STLSIMAP receives mails via a connection encrypted by STARTTLS command.  

This protocol is official supported and installed by default.

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