I have just bought a new Windows 10 laptop.  I am using Windows Live Mail and have copied the settings from my old laptop to the new one and am able to receive emails.  However, I cannot send any.  They are returned with the 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.'

I have tried sending two emails and they both came back with that message. Both addresses are correct and neither email has an attachment.

When I go to the account settings for the POP3 account, I cannot find the place to check what the settings are for the port numbers.

The other thing I can't find is a 'check all mail now' button.