How can I mark a message as read in MailKit

Question

I use MailKit to read some messages from a GMail Account. Works great, but when my application has read a message, I want to mark the message as read, and save that state to GMail. Is this possible with MailKit? I have not found anything about it yet.

score 71 · Accepted Answer · answered Aug 13 '15 at 16:45

71

The way to mark messages as read using the IMAP protocol is to set the \Seen flag on the message(s).

To do this using MailKit, you will first need to know either the index(es) or the UID(s) of the messages that you would like to set the \Seen flag on. Once you have that information, you will want to call one of the AddFlags() methods on the ImapFolder. For example:

folder.AddFlags (uids, MessageFlags.Seen, true);

To mark messages as unread, you would remove the \Seen flag, like so:

folder.RemoveFlags (uids, MessageFlags.Seen, true);

answered Aug 13 '15 at 16:45

jstedfast

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The RemoveFlags function doesn't seem to have any effect. Could you please modify your answer to include the connection to the server too? – Amged Rustom Jan 04 '16 at 13:02
9

Make sure that you open the folder in `FolderAccess.ReadWrite` mode. – jstedfast Jan 04 '16 at 14:10
Thanks. Works now perfectly. – Amged Rustom Jan 05 '16 at 05:57
Is there way to do it having `MimeMessage` only without knowing in what folder it is? – Powercoder Dec 22 '18 at 17:50
No, there's no way to set the flags without knowing the folder. – jstedfast Dec 23 '18 at 02:59

How can I mark a message as read in MailKit

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