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How do I whitelist mail from a legitimate bulk mailer using its name or SMTP headers such as Mailing-List headers?

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How do I whitelist mail from a legitimate bulk mailer using its name or SMTP headers such as Mailing-List headers?

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Start by determining an envelope value or SMTP header that distinguishes the bulk mail from a sample message or DCC log file. The name of the sending computer is the mail_host value in dccm log files. If the distinguishing header or envelope value is not among the main DCC whitelist values, then a “substitute” value must be used. An “ok substitute …” line must be added to the whitelist file and the DCC client program must be told with dccproc -S or dccm -S. There are example whitelist entries in the sample /var/dcc/whiteclnt file.

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