We use imap library and encountered the following error:
Rebex.Net.ImapException: System error (Failure) (NO).
at Rebex.Net.Imap.BboyfsZ(String , ImapResponse , Boolean )
at Rebex.Net.Imap.SelectFolder(String folder, Boolean readOnly)
Error status: 'ProtocolError'
The error occurs not constantly. The code check for a new messages once a minute.
Also right after the error occured we can't do anything through imap as we get:
System.InvalidOperationException: No folder is selected.
at Rebex.Net.Imap.Search(ImapMessageSet messageSet, ImapListFields fields, ImapSearchParameter parameters)
although we had selected a folder before without errors.
Only iisreset helps us. Can you help us with that?