Ralf Hildebrandt via Mailman-Developers writes:
> This is probably due to an error in local_recipient_maps in Postfix.
> https://www.postfix.org/LOCAL_RECIPIENT_README.html
Reading the documentation for Exim4 and Postfix these days, I have to
wonder if there isn't room for a new MTA with a sane
* Mark Sapiro :
> Why in your example did Postfix treat the RCPT TO that was not a valid list
> address differently than any other invalid address in RCPT TO? I.e. Postfix
> should be rejecting that RCPT TO at SMTP time with "unknown user" or some
> similar error. What did Postfix do in your case.
