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ImapClientAuthenticationMechanisms Property

Get the authentication mechanisms supported by the IMAP server.

Namespace:  MailKit.Net.Imap
Assembly:  MailKit (in MailKit.dll) Version: 3.0.0
public override HashSet<string> AuthenticationMechanisms { get; }

Property Value

Type: HashSetString
The authentication mechanisms.



The authentication mechanisms are queried as part of the Connect method.

Tip Tip
To prevent the usage of certain authentication mechanisms, simply remove them from the AuthenticationMechanisms hash set before authenticating.
public static void Capabilities ()
    using (var client = new ImapClient ()) {
        client.Connect ("", 993, SecureSocketOptions.SslOnConnect);

        var mechanisms = string.Join (", ", client.AuthenticationMechanisms);
        Console.WriteLine ("The IMAP server supports the following SASL authentication mechanisms: {0}", mechanisms);

        client.Authenticate ("username", "password");

        if (client.Capabilities.HasFlag (ImapCapabilities.Id)) {
            var clientImplementation = new ImapImplementation { Name = "MailKit", Version = "1.0" };
            var serverImplementation = client.Identify (clientImplementation);

            Console.WriteLine ("Server implementation details:");
            foreach (var property in serverImplementation.Properties)
                Console.WriteLine ("  {0} = {1}", property.Key, property.Value);

        if (client.Capabilities.HasFlag (ImapCapabilities.Acl)) {
            Console.WriteLine ("The IMAP server supports Access Control Lists.");

            Console.WriteLine ("The IMAP server supports the following access rights: {0}", client.Rights);

            Console.WriteLine ("The Inbox has the following access controls:");
            var acl = client.Inbox.GetAccessControlList ();
            foreach (var ac in acl)
                Console.WriteLine ("  {0} = {1}", ac.Name, ac.Rights);

            var myRights = client.Inbox.GetMyAccessRights ();
            Console.WriteLine ("Your current rights for the Inbox folder are: {0}", myRights);

        if (client.Capabilities.HasFlag (ImapCapabilities.Quota)) {
            Console.WriteLine ("The IMAP server supports quotas.");

            Console.WriteLine ("The current quota for the Inbox is:");
            var quota = client.Inbox.GetQuota ();

            if (quota.StorageLimit.HasValue && quota.StorageLimit.Value)
                Console.WriteLine ("  Limited by storage space. Using {0} out of {1} bytes.", quota.CurrentStorageSize.Value, quota.StorageLimit.Value);

            if (quota.MessageLimit.HasValue && quota.MessageLimit.Value)
                Console.WriteLine ("  Limited by the number of messages. Using {0} out of {1} bytes.", quota.CurrentMessageCount.Value, quota.MessageLimit.Value);

            Console.WriteLine ("The quota root is: {0}", quota.QuotaRoot);

        if (client.Capabilities.HasFlag (ImapCapabilities.Thread)) {
            if (client.ThreadingAlgorithms.Contains (ThreadingAlgorithm.OrderedSubject))
                Console.WriteLine ("The IMAP server supports threading by subject.");
            if (client.ThreadingAlgorithms.Contains (ThreadingAlgorithm.References))
                Console.WriteLine ("The IMAP server supports threading by references.");

        client.Disconnect (true);
See Also