Mail missing messages?

[Dekimasu]

After getting a new MacBook the other day, in the Apple "Mail" program, I am attempting to sync my Inbox and other folders, but consistently come up short on the number of messages being transferred.

I have tried rebuilding the mailbox twice, which has brought the number of missing messages down to about 1% (but including 7 of the 9 things I currently have flagged). I haven't noticed a pattern, but the missing messages are not only the most recent ones (during a search, I found that one important message from February was missing).

Is there some way besides a rebuild to tell the program it needs to check for messages that are missing? My archives and sent message folders are also missing a small number of messages, and it's really frustrating. I'm wondering whether I should just go back to Outlook, which I was fairly used to in its Windows form before picking up this new Mac.

 

[Dekimasu]

All the messages that aren't transferring seem to share the attribute "Category: None (colored by Outlook 2003 Red flag)," a category which I am also unable to remove from the web version of my e-mail...

 

[satcomer]

You are starting to notice that Microsoft uses proprietary things in Microsoft Office. Things like flags, highlights and labels will not transfer to s non-Windows version. Sometimes not even between different slightly older versions of Windows Office.

The best practice is not to use flags, highlights & labels when exchanging between systems, just use plain text when emailing too.