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.