X-Failed-Recipients: x@y
Auto-Submitted: auto-replied
F From: Mail Delivery System <Mailer-Daemon@myhost.test.ex>
T To: CALLER@myhost.test.ex
Subject: Mail delivery failed: returning message to sender
X-Failed-Recipients: x@y
Auto-Submitted: auto-replied
F From: Mail Delivery System <Mailer-Daemon@myhost.test.ex>
T To: CALLER@myhost.test.ex
Subject: Mail delivery failed: returning message to sender