IMAP server 93% full?

If the warning is legitimate and not a phishing attempt trying to steal your username and password, then the only email account that matters is the one that is giving you the warning. Deleting from your other accounts won't free up space on that one. Also, all of the folders in that one mailbox will count against your allowed space. It won't work to move mail out of your Inbox to a custom folder because the mail is still in your mailbox. After you delete email, make sure you empty your trash/deleted items, because that folder probably counts too.

If you still don't have enough space after all that, you can create an Outlook data file on your local computer's hard drive and move as much mail as you want out of the mailbox and into that Outlook data file.

Edit:

I think I'm missing something. What is telling you that your server is 93% full? Is this an email message, a pop-up box from Outlook, or something else? If you can put a picture of what you're seeing on photobucket or somewhere like that, that would be helpful.

Edit 2:

It's impossible to tell which account it is given this info, then. I recommend one of two courses of action:

1. Log into the webmail interface for each account and see if it tells you whether or not your mailbox is almost full. Not all webmail clients will do that, but many will.

2. Create an Outlook data file. Create a folder in the data file for each of your email accounts. Move all of the email from your various inboxes into the folders you just created. This will delete everything from the inboxes on the servers and move it only to your local computer, freeing up that space on the server. The danger of this is that the data will not be backed up unless you are backing up your computer.

POP3 and IMAP servers are the two digital mail servers, Http servers are internet servers. except of course those are new food products via which those would be aspiring actresses or waiters. Cheers!