CDO When sending mail, the SMTP authentication mode is set (the setting error will be reported when email)

ENUM CDOPROTOCOLSAUTHENTICATION

Const cdontlm = 2

Member of cdo.cdoprotocolsauthentication

Use the ntlm authentication mechanism

Const cdobasic = 1

Member of cdo.cdoprotocolsauthentication

Use the basic (Clear text) Authentication Mechanism.

Const cdoanonymous = 0

Member of cdo.cdoprotocolsauthentication

Perform no authentication (anonymous)

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Set icon = imsg.configuration

icon.fields ("

http://schemas.microsoft.com/cdo/configuration/smtpauthenticate").value = cdoanonymous' Sets the SMTP authentication method for anonymity

icon.fields.Update