Windows Mail account

I'm a silver-surfer and apologise straight away for my lack of technical knowledge. I have used Windows Mail for years with no problem, however a couple of days ago I was still able to receive emails but not able to send any. I got in touch with my Broadband provider who were helpful but pointed out that Windows Mail was nothing to do with them. I had a Webmail account with them, which was rarely used, but they offered to check server settings etc. Whilst checking details in the 'Tools: Internet Account box' my name was deleted by mistake, which resulted in us having to create a new account. Back in Windows Mail my account now appears to have been deleted. I have tried to 'Add' myself back into Internet accounts but it is asking for info. ( e.g. Incoming Server, Outgoing Server, and SMTP name ) which I don't have the answer to. Can anyone please help, using words of one syllable? I would be eternally grateful.