Scott,

any ideas for this...? I just got home after being away for 5 days, during which time I did not use my email account (a "me" account) from my imac -- I did, however, continue to use this same email account on my iphone and use it now from my macpro to email you.

When i went to my imac today, that email account is entirely absent from the mail program on my imac. I open email from the imac and all files are empty; i cannot send an email either. very strange.

I would love your advice...my hunch is that something simple is going on, maybe something turned off accidentally? the internet is definitely up and running fine on the imac.
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The first thing I would check is in mail’s preferences. Under the accounts tab, check the advanced pane to see if the account has been disabled. Be sure the account has the “enable this account” box checked. See below:

If it is checked then you may just want to delete the account by selecting it then hitting the minus button in the bottom left hand area then re add it again. MobileMe accounts are IMAP so you shouldn’t loose anything. It should just all come right back again.

you are money...it was disabled. all good now. Thanks much.