IPWorks S/MIME 2020 .NET Edition

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AuthMechanism Property

The authentication mechanism to be used when connecting to the mail server.


public SpopAuthMechanisms AuthMechanism { get; set; }

enum SpopAuthMechanisms { amUserPassword, amCRAMMD5, amNTLM, amAPOP, amSASLPlain, amSASLDigestMD5, amKerberos, amXOAUTH2 }
Public Property AuthMechanism As SpopAuthMechanisms

Enum SpopAuthMechanisms amUserPassword amCRAMMD5 amNTLM amAPOP amSASLPlain amSASLDigestMD5 amKerberos amXOAUTH2 End Enum

Default Value



This property is used as the authentication mechanism when connecting to the mail server. By default, this property is amUserPassword (0), and default plaintext authentication is used to login to the server. Other, more secure, options include amCRAMMD5 (1) for CRAM-MD5, amNTLM (2) for NTLM authentication, amAPOP (3) for APOP authentication, and amSASLDigestMD5 (5) for SASL DIGEST-MD5 authentication.

amSASLPlain (4) is also available, but most servers require a secure SSL connection when utilizing this authentication mechanism.

amKerberos (6) is for Kerberos authentication. NOTE: This functionality is only available in Windows.

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IPWorks S/MIME 2020 .NET Edition - Version 20.0 [Build 8161]