Reporting-MTA: dns; relay.mailchannels.net
X-Postfix-Queue-ID: 64065441E1F
X-Postfix-Sender: rfc822; support@tservers4.com
Arrival-Date: Fri, 20 Feb 2026 01:55:05 +0000 (UTC)

Final-Recipient: rfc822; admin@robot-pikos.firebaseapp.com
Original-Recipient: rfc822;admin@robot-pikos.firebaseapp.com
Action: failed
Status: 4.0.0
Remote-MTA: dns; robot-pikos.firebaseapp.com
Diagnostic-Code: smtp; 421 Downstream server error
