How to fetch messages with setting the SEEN flag?

[jsuto]

I have a script that imports a user's emails to an archive daily by fetching today's data. However the user is confused because after the script has run all of his emails are marked as read (=seen). So I wonder of there's a way to instruct fetch not to set the SEEN flag?

[mjs]

There's two ways to do this, open the folder as read only when calling select_folder or retrieve messages using BODY.PEEK[].

e.g.

client.fetch(msg_ids, ['BODY.PEEK[]'])

BODY.PEEK[] is the same RFC822 but won't affect the read status of messages.

https://www.rfc-editor.org/rfc/rfc3501#section-6.4.5