SSL and TLS Introduction¶

SSL connection encrypts data between the SMTP component and SMTP server to protects user, password and email content in TCP/IP level. Now this technology is commonly used and many SMTP servers are deployed with SSL such as Gmail, Yahoo and Hotmail. There are two ways to deploy SSL on SMTP server:

• Explicit SSL (TLS)

  Using STARTTLS command to switch SSL channel on normal SMTP port (25 or 587);

• Implicit SSL

  Deploying SSL on another port (465 or other port, you may query it from your server administrator

EASendMail SMTP component supports both ways. The connection can be specified by EASendMail.SmtpConnectType enumeration.