Testing SMTP connection...
Test Results
Understanding SMTP
What is SMTP?
Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending email messages across the Internet. It defines how email messages should be formatted, encrypted, and transmitted between mail servers.
SMTP Security
• TLS (Transport Layer Security): Encrypts the connection
• SSL (Secure Sockets Layer): Older encryption standard
• Authentication: Verifies sender identity
• Port Selection: Different ports for different security levels
Common Issues
• Authentication failed (wrong credentials)
• Connection timeout (firewall blocking)
• Certificate errors (SSL/TLS issues)
• Port blocked by ISP or firewall
• Incorrect server settings