Verify() public method

Verify the existence of a mailbox address.
Verifies the existence a mailbox address with the SMTP server, returning the expanded mailbox address if it exists.
/// is null. /// /// is an empty string. /// /// The has been disposed. /// /// The is not connected. /// /// Authentication is required before verifying the existence of an address. /// /// The operation has been canceled. /// /// An I/O error occurred. /// /// The SMTP command failed. /// /// An SMTP protocol exception occurred. ///
public Verify ( string address, CancellationToken cancellationToken = default(CancellationToken) ) : MimeKit.MailboxAddress
address string The mailbox address.
cancellationToken System.Threading.CancellationToken The cancellation token.
return MimeKit.MailboxAddress
SmtpClient Class Documentation
Example #1
-1
		public void TestArgumentExceptions ()
		{
			using (var client = new SmtpClient ()) {
				var credentials = new NetworkCredential ("username", "password");
				var socket = new Socket (SocketType.Stream, ProtocolType.Tcp);
				var message = CreateSimpleMessage ();
				var sender = message.From.Mailboxes.FirstOrDefault ();
				var recipients = message.To.Mailboxes.ToList ();
				var options = FormatOptions.Default;
				var empty = new MailboxAddress[0];

				// Connect
				Assert.Throws<ArgumentNullException> (() => client.Connect ((Uri) null));
				Assert.Throws<ArgumentNullException> (async () => await client.ConnectAsync ((Uri) null));
				Assert.Throws<ArgumentNullException> (() => client.Connect (null, 25, false));
				Assert.Throws<ArgumentNullException> (async () => await client.ConnectAsync (null, 25, false));
				Assert.Throws<ArgumentException> (() => client.Connect (string.Empty, 25, false));
				Assert.Throws<ArgumentException> (async () => await client.ConnectAsync (string.Empty, 25, false));
				Assert.Throws<ArgumentOutOfRangeException> (() => client.Connect ("host", -1, false));
				Assert.Throws<ArgumentOutOfRangeException> (async () => await client.ConnectAsync ("host", -1, false));
				Assert.Throws<ArgumentNullException> (() => client.Connect (null, 25, SecureSocketOptions.None));
				Assert.Throws<ArgumentNullException> (async () => await client.ConnectAsync (null, 25, SecureSocketOptions.None));
				Assert.Throws<ArgumentException> (() => client.Connect (string.Empty, 25, SecureSocketOptions.None));
				Assert.Throws<ArgumentException> (async () => await client.ConnectAsync (string.Empty, 25, SecureSocketOptions.None));
				Assert.Throws<ArgumentOutOfRangeException> (() => client.Connect ("host", -1, SecureSocketOptions.None));
				Assert.Throws<ArgumentOutOfRangeException> (async () => await client.ConnectAsync ("host", -1, SecureSocketOptions.None));

				Assert.Throws<ArgumentNullException> (() => client.Connect (null, "host", 25, SecureSocketOptions.None));
				Assert.Throws<ArgumentException> (() => client.Connect (socket, "host", 25, SecureSocketOptions.None));

				// Authenticate
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (null));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (null));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (null, "password"));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (null, "password"));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate ("username", null));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync ("username", null));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (null, credentials));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (null, credentials));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (Encoding.UTF8, null));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (Encoding.UTF8, null));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (null, "username", "password"));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (null, "username", "password"));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (Encoding.UTF8, null, "password"));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (Encoding.UTF8, null, "password"));
				Assert.Throws<ArgumentNullException> (() => client.Authenticate (Encoding.UTF8, "username", null));
				Assert.Throws<ArgumentNullException> (async () => await client.AuthenticateAsync (Encoding.UTF8, "username", null));

				// Send
				Assert.Throws<ArgumentNullException> (() => client.Send (null));

				Assert.Throws<ArgumentNullException> (() => client.Send (null, message));
				Assert.Throws<ArgumentNullException> (() => client.Send (options, null));

				Assert.Throws<ArgumentNullException> (() => client.Send (message, null, recipients));
				Assert.Throws<ArgumentNullException> (() => client.Send (message, sender, null));
				Assert.Throws<InvalidOperationException> (() => client.Send (message, sender, empty));

				Assert.Throws<ArgumentNullException> (() => client.Send (null, message, sender, recipients));
				Assert.Throws<ArgumentNullException> (() => client.Send (options, message, null, recipients));
				Assert.Throws<ArgumentNullException> (() => client.Send (options, message, sender, null));
				Assert.Throws<InvalidOperationException> (() => client.Send (options, message, sender, empty));

				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (null));

				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (null, message));
				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (options, null));

				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (message, null, recipients));
				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (message, sender, null));
				Assert.Throws<InvalidOperationException> (async () => await client.SendAsync (message, sender, empty));

				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (null, message, sender, recipients));
				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (options, message, null, recipients));
				Assert.Throws<ArgumentNullException> (async () => await client.SendAsync (options, message, sender, null));
				Assert.Throws<InvalidOperationException> (async () => await client.SendAsync (options, message, sender, empty));

				// Expand
				Assert.Throws<ArgumentNullException> (() => client.Expand (null));
				Assert.Throws<ArgumentException> (() => client.Expand (string.Empty));
				Assert.Throws<ArgumentException> (() => client.Expand ("line1\r\nline2"));
				Assert.Throws<ArgumentNullException> (async () => await client.ExpandAsync (null));
				Assert.Throws<ArgumentException> (async () => await client.ExpandAsync (string.Empty));
				Assert.Throws<ArgumentException> (async () => await client.ExpandAsync ("line1\r\nline2"));

				// Verify
				Assert.Throws<ArgumentNullException> (() => client.Verify (null));
				Assert.Throws<ArgumentException> (() => client.Verify (string.Empty));
				Assert.Throws<ArgumentException> (() => client.Verify ("line1\r\nline2"));
				Assert.Throws<ArgumentNullException> (async () => await client.VerifyAsync (null));
				Assert.Throws<ArgumentException> (async () => await client.VerifyAsync (string.Empty));
				Assert.Throws<ArgumentException> (async () => await client.VerifyAsync ("line1\r\nline2"));
			}
		}