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What type of authentication should I use?

Some email programs let you specify the authentication method - the typical authentication types are:

Authentication Method Compatibility
PLAIN / PLAIN TEXT Compatible
CRAM-MD5 Compatible
DIGEST-MD5 Compatible
NTLM Incompatible

Of these we would recommend CRAM-MD5 - if that does not work try DIGEST-MD5 or PLAIN TEXT. NTLM authentication is not currently compatible with AuthSMTP.

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