Internet Message Access Protocol (IMAP) Capabilities 2009-12-22 2025-12-22 Expert Review Arnt Gulbrandsen, Barry Leiba $MDNSent SHARED COMMON BOTH $Forwarded BOTH COMMON BOTH $SubmitPending SHARED COMMON BOTH $Submitted SHARED COMMON BOTH $Junk BOTH COMMON BOTH $NotJunk BOTH COMMON BOTH $Phishing SHARED COMMON BOTH $Important PRIVATE COMMON BOTH $draft BOTH COMMON JMAP-only $seen BOTH COMMON JMAP-only $flagged BOTH COMMON JMAP-only $answered BOTH COMMON JMAP-only $recent Reserved $autosent SHARED COMMON BOTH $canunsubscribe SHARED COMMON BOTH $followed SHARED COMMON BOTH $hasattachment SHARED COMMON BOTH $hasmemo SHARED COMMON BOTH $hasnoattachment SHARED COMMON BOTH $imported SHARED COMMON BOTH $istrusted SHARED COMMON BOTH $MailFlagBit0 SHARED COMMON BOTH $MailFlagBit1 SHARED COMMON BOTH $MailFlagBit2 SHARED COMMON BOTH $maskedemail SHARED LIMITED BOTH $memo SHARED COMMON BOTH $muted SHARED COMMON BOTH $new SHARED LIMITED BOTH $notify SHARED COMMON BOTH $unsubscribed SHARED COMMON BOTH Alexey Melnikov mailto:alexey.melnikov&isode.com 2010-08-26 Rob Mueller mailto:robm&fastmail.com 2017-04-03