Subject: Undelivered Mail Returned to Sender
From: [email-masked] (Mail Delivery System)
To: [email-masked]
Date: Sat, 25 Jun 2022 21:35:33 -0400 (CDT)

This is the mail system at host relay01.example.org.

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

<[email-masked]>: host mx2.example.net[80.241.60.215] said: 552 5.2.2
    <[email-masked]>: Recipient address rejected: Mailbox quota exceeded (in
    reply to RCPT TO command)

<[email-masked]>: host mx1.example.net[80.241.60.212] said: 552 5.2.2
    <[email-masked]>: Recipient address rejected: Mailbox quota
    exceeded (in reply to RCPT TO command)

Subject: ...
From: Alice <[email-masked]>
To: <[email-masked]>, <[email-masked]>
Date: Sun, 26 Jun 2022 01:35:20 +0000