It looks like at some point in the past you sent a message with a 48MB attachment. Even though was sent correctly from outbox, Yahoo is blocking our attempt to add it to the 'sent' folder. Apparently their IMAP interface does enforce size restrictions.
You may be able to get around this by finding the message in question, deleting it, and emptying trash. You can enter item:98896 in the search bar; this should return the item in question. |