When a new message is added to a folder, it is marked UNSEEN (IMAP only), NEW (WorldClient only) and UNREAD (IMAP and WorldClient).
This is normally desired as it makes it easy to pick out new messages, but when you are using BCC-to-sent-folder, or sharing out a bayesian learning folder, for example, this may not be desired.
If you just want mail to appear as “Read” rather then the default IMAP flags, edit the HIWATER.MRK file within the message folder directory and set the following key:
[Settings]
NewMessagesAreSeen=Yes
NewMessagesAreSeen by Dave Warren (everything-mdaemon.com) is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.