> This work for 'date' header using IGNORE (or REPLACE changing the > header name) in header_checks, than cleanup will add a date header. > If doesn't work the documentation should be fixed or I > misunderstand?
as Wietse just mentioned to me, that behavior depends on the parameter undisclosed_recipients_header which is set to "To: undisclosed-recipients:;" by default. That's why header is not empty and thus no rewrite will happen. I was just trying to "specify an empty value to disable this feature" (http://www.postfix.org/postconf.5.html#undisclosed_recipients_header) but getting errors Nov 8 14:40:13 hermes postfix/cleanup[14723]: fatal: bad string length 0 < 1: undisclosed_recipients_header = Nov 8 14:40:14 hermes postfix/master[14705]: warning: process /usr/lib/postfix/cleanup pid 14723 exit status 1 Nov 8 14:40:14 hermes postfix/master[14705]: warning: /usr/lib/postfix/cleanup: bad command startup -- throttling How do I set an empty value for undisclosed_recipients_header ? I did it by specifying undisclosed_recipients_header = in main.cf. Thanks, Martin
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