On Sep 21, 2013, at 15:17, Jan P. Kessler <post...@jpkessler.info> wrote:
>> Would the single, existing instance with 'smtp_header_checks' not >> achieve the same thing? >> >> http://www.postfix.org/postconf.5.html#smtp_header_checks > > Not, if the required headers are added later on by a content_filter. The documentation states that 'These tables are searched while mail is being delivered'. As the Postfix SMTP client is responsible for delivering mail to the specified forwarding target, why would these be skipped if the message has passed through a content filter? All the content filter does is reinsert a modified message into the queue, does it not? As I read it, 'smtp_header_checks' provides a way to do header checks only on messages that are leaving the system, leaving local delivery unaffected? Mvg, Joni
