Re: X-UID in mutt

["Chen Dennis" <dennis11111@xxxxxxxxxxx>]

> Are you sometimes accessing your mail via IMAP, and sometimes
> remotely?  I believe X-UID is a header used primarily by IMAP...  If
> you access your mail via local files, you won't see the header added
> until you later access it via IMAP.

Hi Derek,

Thanks for your input.

Yes, I do switching the ways of accessing my email. I followed your 
guessing to do more experiments. And Yes, if you read email locally, 
then X-UID will not be added; otherwise X-UID will be added.

There's one interesting thing to look at, I tried to read email locally
'first', then used an IMAP client to read that email again. However, 
X-UID is not added this time. If you reverse the order (use IMAP
before locally reading), X-UID is there.Does the order really matter?

Thank you,
Denins