[RFC] 5259 [Name] IMAP - CONVERT Extension [Capability name] CONVERT (L) [Agorum Core] no [Apache James] no [Archive​opteryx] no [Axigen] no [Citadel] no [Communigate Pro] no [Courier] no [Cyrus] no [DBMail] no [Dovecot] no [GMail] no [IceWarp] no [Isode] no [Kerio Connect] no [MDaemon] no [Microsoft Exchange] no [Oracle] no [UW-IMAP] no [Zimbra] no [WinGate 7] 
no