The host 'SMTP' could not be found. Please verify that you have entered the server name correctly. Account: 'POP3', Server: 'SMTP', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D

How do I solve the problem?

What email service trying to use?

Was replying posts through craigslist

If this only happens with craigslist and no one else, could be on their end

Here is some info
Troubleshooting error messages that you receive when you try to send and receive e-mail in Outlook and Outlook Express

Confirm your settings and see if you can email others than craigslist

What email service are you using