950xl not sending emails from multiple accounts

[bozza72]

Hi my 950xl has suddenly stopped sending emails after the last update. Doesn't matter if its outlook,Gmail or pop3 I get this error message.
"We weren't able to send this message, so we've put it in your Drafts folder. Before you try sending it again, you can check to see if the address is correct and that no attachments are too large."
Any ideas ???