By default, this is disabled.Īuthentication credentials must match those of the email sender This may need to be enabled if mail is sent with a local user's address, but from another domain mail server, such as a user's Internet Provider's server. If the message is being sent from a local address, to a local address, SecurityGateway will not require authentication to send the message. If an incoming session does not authenticate with a username and password on the server, and gives a local address in the MAIL FROM command, SecurityGateway will refuse to accept the message, and return a 'recipient unknown' error. You may then configure the following options:Īuthentication is always required when mail is from local accounts Click on Security in the lower-left corner.This article explains how to configure SecurityGateway's requirements regarding SMTP authentication, to help further validate the sender as a valid user on the server, and therefore prevent malicious users from sending messages from supposed local addresses. KBA-01912 Configuring SMTP authentication options in SecurityGateway
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