Reporting-MTA: dns;EXCH2.uni-obuda.hu
Received-From-MTA: dns;sendmail.uni-obuda.hu
Arrival-Date: Fri, 8 May 2026 11:33:19 +0000

Original-Recipient: rfc822;xxxxxxxxx@xxxxxxxxx.xx
Final-Recipient: rfc822;xxxxxxxxx@xxxxxxxxx.xx
Action: failed
Status: 5.7.133
Diagnostic-Code: smtp;550 5.7.133 RESOLVER.RST.SenderNotAuthenticatedForGroup; authentication required; Delivery restriction check failed because the sender was not authenticated when sending to this group
X-Display-Name:
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