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  • As far as I can tell, this only implements a table lookup. However, there might be several different From header addresses used with the same Envelope From address, so the table needs to act somewhat dynamically. Is there a variable for the From header address that can be used for the result? Commented Mar 23, 2012 at 9:38
  • You could specify a regular expression: postfix.org/DATABASE_README.html#types Commented Nov 29, 2013 at 12:24
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    I don't see a way to do the rewriting dynamically, specifically to rewrite the envelope address based on the 'From:' address - even using regex or pcre tables... Commented May 10, 2016 at 14:46
  • I agree there doesnt seem to be a way to do it with plain config. You could do it with pymilter.org and a fairly simple script but I'd still be careful, maybe make a whitelist of allowed senders Commented Jun 18, 2025 at 9:29