MobileMe and Mac Mail issues

Hello there,

You probably here this a lot on this forum (well I can see from a search that you do) but I couldn't fine any information to help with my issue.

I use Mobile me to sync my Macbook, Mini and iPhone and (after a few issues with calendars and contacts) has worked like a dream... until now.

For some reason the smtp.me.com mailbox will no longer work on the Mini. I've tried to remove and then add the mailbox manually, turn off Mobileme syncing resetting sync data and then syncing again but whenever the mailbox appears it always has an exclamation mark over it and there are no emails.

I've even tried to delete the mailboxes from preferences and then re-sync but everything produces the same results.

Can anyone sugest what to do next or will I have to reinstall mail from the system disk?

Many thanks,

Will