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Do ETRN commands need to be authenticated?

April 26, 2017authenticated commands etrn

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Do ETRN commands need to be authenticated?

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No, an ETRN command can’t be authenticated. Since the system will only release the queue to the primary MX or final destination server for SMTP redirection, there is no need for authentication. To ensure messages will be released to a specific IP address, we recommend using SMTP Redirection mode with your mail server’s IP address and a random port other than 25.