X-Failed-Recipients: ":fail: fail message"@special
Auto-Submitted: auto-replied
From: Mail Delivery System <Mailer-Daemon@test.ex>
To: CALLER@test.ex
Subject: Mail delivery failed: returning message to sender
X-Failed-Recipients: ":fail: fail message"@special
Auto-Submitted: auto-replied
From: Mail Delivery System <Mailer-Daemon@test.ex>
To: CALLER@test.ex
Subject: Mail delivery failed: returning message to sender