check “Require log on using secure password authentication.”

Incoming Server
Connection Type: POP3
Requires an encrypted connection (SSL)
Port: 995
Hostname: mail.caprock-spur.com
Username: full email address including @caprock-spur.com
Password:

Outgoing Server
Hostname: mail.caprock-spur.com
Port: 587
Security Option: STARTTLS (TLS)
Check “My server requires authentication”
Username: full email address including @caprock-spur.com
Password: