I have been using live mail for several years on windows 10 and all of a sudden i can't send mail. I can only receive mail. I contacted my email server and was told settings are correct. here is error code

An unknown error has occurred.

Server: 'smtp.homestead.com'
Windows Live Mail Error ID: 0x80070057
Protocol: SMTP
Port: 587
Secure(SSL): No

**Moved from:  Windows / Windows 10 / Windows settings **