On Tue, 22 Oct 2019 at 17:05, Wietse Venema <wie...@porcupine.org> wrote: > > Noel Jones: > > On 10/22/2019 10:27 AM, Dominic Raferd wrote: > > > On Tue, 22 Oct 2019 at 16:18, Noel Jones <njo...@megan.vbhcs.org> wrote: > > >> ... > > >>> I am using postfix 3.3. Apart from cron, the only other local source > > >>> of such old-style headers that I can find is postfix itself: > > >>> e.g. From: mailer-dae...@streamingbats.co.uk (Mail Delivery System) > > >>> - maybe more recent postfix releases use the new style? > > >>> > > >> > > >> > > >> http://www.postfix.org/postconf.5.html#header_from_format > > > > > > Thanks Noel but I am using that (default) setting already: > > > # postconf header_from_format > > > header_from_format = standard > > > > > > I find the same behaviour in postfix 3.3.0 and 3.3.2. > > > > > > > > > Then whatever is generating the mail uses the obsolete format. You > > can use a header_checks IGNORE action to remove the offending > > header, and postfix will add it back. > > That is a better suggestion than using header_checks. However this > works only for /usr/bin/sendmail submission.
I will try this, thanks. but it still seems to me that local double-bounce messages, which surely originate from Postfix, are using the legacy From header. I have put a (lightly obfuscated and shortened) example at https://pastebin.com/mVqGjAn2 which was generated while the server's internet connection was down - note the From: header.
