11e51f25_muniGate_Pro_Server__Mailboxes__Negative_Name
[Name] MDNSent [Description] This flag is set when an MDN ("read report") for the message has been sent. This flag helps mail clients to send only one MDN report for each message. This flag is explicitly set and reset with mail client applications. [IMAP Name] $MDNSent [Negative Name] 
NoMDNSent
CommuniGate Pro Server: Mailboxes
Negative Name