cohda-83.txt - P2 2026-02-13 Bernd Error code 5.4.12 (ID:83)

13/02/26
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02:08 Email form Bernd advising of bounced email issue. Error code 5.4.12 In Exchange Online and Office 365 - https://go.microsoft.com/fwlink/?linkId=397497
10:15 Replied to Bernd asking if had been able to email emre.gorgun@karsan.com.tr
11:25 Cohda ticket CREATED.

The Microsoft link doesnt specifically mention 5.4.12 but talks about NDR routing loops, which is something I suspected.

11:53 Logged ticket with Iocane - IOCANE:0504370. Received "Ticket logged - Exchange Online Error code 5.4.12 [IOCANE:0504370]" email confirming the ticket had been logged. 
      Status set to "WAITING"

15:03 "Ticket reolsved - Exchange Online Error code 5.4.23 [IOCANE:0504370]" email from IOCANNE.support@iocne.com.au 

14:48 "Ticket Update - Exchange Online Error code 5.4.23 [IOCANE:0504370]" email from IOCANNE.support@iocne.com.au advising the issue appears to be with the 7-EXC02.kiraca.net server.
Forwarded this on to Bernd & advised Iocane they can close the ticket.

18/2/26
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13:33 "Confirm Ticket Closed - Exchange Online Error code 5.4.12 [IOCANE:0504370] email received from IOCANE.support@iocane.com.au confirming if Im happy to clock the ticket or not. Clicked the green tick.