如何标记在客户端同步到服务器中转发的消息？

Question

当我如何在客户端中转发邮件时，邮件状态将为“已转发”，但服务器永远不会具有转发标志

Answer 1

IMAP does not have a concept of "Forwarded", so IMAP does not have a Forwarded flag. It only has an \\Answered flag which most clients use to denote that the message has been replied to.

If your server supports custom flags, your other IMAP client(s) may be using a custom flag for this (such as "$Forwarded"). MailKit allows you to set custom flags as well:

var customFlags = new HashSet<string> ();
customFlags.Add ("$Forwarded");

folder.AddFlags (uids, MessageFlags.None, customFlags, true);