SmtpClient.vrfy

This method asks server to verify if the user's mailbox exists on server. You can pass username or <[e-mail]> as an argument. The result is a reply that contains e-mail of the user, or an error code.

IMPORTANT NOTE: most of servers forbid using of VRFY considering it to be a security hole.

class SmtpClient
final
vrfy
(
string username
)

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