HELO mail.example.test
MAIL FROM: spam-header@example.test
RCPT TO: user1@localhost.localdomain
DATA
From: Docker Mail Server <spam-header@example.test>
To: Existing Local User <user1@localhost.localdomain>
Date: Sat, 21 Jan 2023 11:11:11 +0000
Subject: Test Message rspamd-spam-header.txt
YJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X

.
QUIT