Your IMAP server wants to alert you to the following: Email is too large, limit size to less than 20 MB
Solution 1:
I had the same error. Called Go Daddy support. He sent me the following from a forum that he looked up:
Go to Outlook and run an Advanced Find. (Click in the search box and a new menu “Search” will open – you will see the button for Search Tools and then Advanced Find).
In the new window “Advanced Find” – on the first line, click browse, and check all the folders (and subfolders) in the email account (You might be able to click the Search Subfolders dialog box, but it didn't seem to work for me so I checked all the boxes). Hit OK
Go to the second tab “More Choices” and only click the radio box that says “Only items with one or more attachments”. Do NOT click or add anything else.
Click Find Now (on the right).
When all the emails have been displayed, sort by SIZE. You are only interested in the emails that show up with a size of 0 (ZERO!). Open the emails and you will probably see that these emails have attachments that add up to over 20MB. Delete them – and then delete them again from the trash bin.
Close outlook and reopen it. Run Send/Receive All Folders and it should run without the error message.
Note: You can delete from this file list and you will get the error message on every "delete". When you delete an item from the folder, it immediately pops into the Trash folder. Just immediately delete the item again from the Trash folder. - OR - Better Yet
- select all items which have 20MB and above, (by holding Ctrl or Ctrl+Shift).
- hold Shift while you click on the 'Delete' button, it will delete it permanently.
I had six items with attachments that exceeded 20MB - mostly photo albums and architectural plans that I had emailed.
Solution 2:
The IMAP server is rejecting the message for the reason that it gave. This is a policy setting made by the IMAP server operator. The short answer is that you need to talk to whoever runs the IMAP server.
Godaddy has a page which documents various limitations on their email system. At this time it says there's a 30MB limit on outgoing messages and a 20MB limit on message attachments.