can't get email
I can no longer get into my email (version 6.6) account. I can open it initially, but I get "Mail can't connect to the account "..." ", & when I enter my password it rejects it and again says can't connect. Also everything in my inbox seems to have disappeared (except for 13 mysterious messages which don't show up in the "sort by date" column). I can still view old messages, in mailboxes other than my inbox, which won't display any messages.
I hope someone can help. I am not terribly computer savvy and even my husband (who IS) can't figure it out, but he doesn't use a mac. Thanks, I really appreciate any advice.
MacBook Pro, OS X Mountain Lion (10.8.5)