Question

I have gone through many example codes on SMTP connection. In those, most people use SmtpServer.EnableSsl=true ; with only gmail (my observation). What is the scope or use of this code?

Answer 1

Look at from MSDN for SmtpClient.EnableSsl;

Specify whether the SmtpClient uses Secure Sockets Layer (SSL) to
encrypt the connection.

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true if the SmtpClient uses SSL; otherwise, false. The default is
false. The EnableSsl property specifies whether SSL is used to access
the specified SMTP mail server.