Viktor, After doing as explained @ http://www.postfix.org/FILTER_README.html, I'm still having same behavior.
Jan 4 15:23:16 zimuslab postfix/pipe[2026324]: 90FAD13DE3B1: to=<x...@xx.net>, relay=post_queue_content_filter, delay=0.07, delays=0.04/0/0/0.02, dsn=2.0.0, status=sent (delivered via post_queue_content_filter service (action=PERMIT)) After changing my script to simply "return" the situation persists. Jan 4 15:33:27 zimuslab postfix/pipe[2026361]: 7751713DE600: to=<x...@xx.net>, relay=post_queue_content_filter, delay=0.07, delays=0.04/0/0/0.02, dsn=2.0.0, status=sent (delivered via post_queue_content_filter service) BR, Rafael Em sex, 4 de jan de 2019 às 15:28, Viktor Dukhovni < postfix-us...@dukhovni.org> escreveu: > > > > On Jan 4, 2019, at 11:54 AM, Rafael Azevedo <raf...@gmail.com> wrote: > > > > So I kindly ask you guys how can I re-inject message back into queue. > > http://www.postfix.org/FILTER_README.html > > -- > Viktor. > >