Returned mail: see transcript for details

The original message was received at Mon, 20 Nov 2023 11:26:17 +0900
from sc7.cynet.co.jp [202.221.162.67]

----- The following addresses had permanent fatal errors -----
(reason: 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table) ----- Transcript of session follows ----- ... while talking to [18.177.24.174]: >>> DATA <<< 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table 550 5.1.1 ... User unknown <<< 554 5.5.1 Error: no valid recipients Reporting-MTA: dns; mx4.cynet.co.jp Received-From-MTA: DNS; sc7.cynet.co.jp Arrival-Date: Mon, 20 Nov 2023 11:26:17 +0900 Final-Recipient: RFC822; [e-mail] Action: failed Status: 5.1.1 Remote-MTA: DNS; [18.177.24.174] Diagnostic-Code: SMTP; 550 5.1.1 : Recipient address rejected: User unknown in virtual mailbox table Last-Attempt-Date: Mon, 20 Nov 2023 11:26:17 +0900