[Pkg-mailman-hackers] Undelivered Mail Returned to Sender

[Mail Delivery System]

This is the mail system at host kzl.nazwa.pl.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<m.lisowski at kzl.nazwa.pl> (expanded from <info at kzl.com.pl>): host
    kzl.nazwa.pl[77.55.157.182] said: 550 5.1.1 <m.lisowski at kzl.nazwa.pl>:
    Recipient address rejected: User unknown in virtual mailbox table (in reply
    to RCPT TO command)

<m.stupaj at kzl.nazwa.pl> (expanded from <info at kzl.com.pl>): host
    kzl.nazwa.pl[77.55.157.182] said: 550 5.1.1 <m.stupaj at kzl.nazwa.pl>:
    Recipient address rejected: User unknown in virtual mailbox table (in reply
    to RCPT TO command)
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From: <mailman at packages.debian.org>
Subject: P?atno?? powi?zana z Twoim kontem.
Date: 6 Oct 2023 18:15:22 +0100
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