Subject: Undeliverable: Kurs om legionella och energiförluster i tappvattensystem

From: <[email-masked]>
Date: Tue, 18 Nov 2025 09:52:42 +0000

[https://products.office.com/en-us/CMSImages/Office365Logo_Orange.png?version=b8d100a9-0a8b-8e6a-88e1-ef488fee0470]
Your message to [email-masked] couldn't be delivered.
hakan.nilsson wasn't found at vasakronan.se.
19812_4835_829097_bo. . .       Office 365      hakan.nilsson
Action Required                 Recipient
Unknown To address

How to Fix It
The address may be misspelled or may not exist. Try one or more of the following:

  *   Send the message again following these steps: In Outlook, open this non-delivery report (NDR) and choose Send Again from the Report ribbon. In Outlook on the web, select this NDR, then select the link "To send this message again, click here." Then delete and retype the entire recipient address. If prompted with an Auto-Complete List suggestion don't select it. After typing the complete address, click Send.
  *   Contact the recipient (by phone, for example) to check that the address is correct.
  *   The recipient may have set up email forwarding to an incorrect address. Ask them to check that any forwarding they've set up is working correctly.
  *   Clear the recipient Auto-Complete List in Outlook or Outlook on the web by following the steps in this article: Fix email delivery issues for error code 5.1.1 in Office 365<https://go.microsoft.com/fwlink/?LinkId=389363>, and then send the message again. Retype the entire recipient address before selecting Send.

Was this helpful? Send feedback to Microsoft<https://go.microsoft.com/fwlink/?LinkId=618497>.
________________________________

More Info for Email Admins
Status code 554 5.4.14

Typically this error occurs because the recipient email address is incorrect or doesn't exist at the destination domain. This can usually be fixed by the sender. However, sometimes the issue needs to be fixed by the recipient or the recipient's email admin. If the steps in the How to Fix It section above don't fix the problem, and you're the email admin for the recipient, try one or more of the following:

The email address exists and is correct - Confirm that the recipient address exists, is correct, and is accepting messages.

Synchronize your directories - If you have a hybrid environment and are using directory synchronization make sure the recipient's email address is synced correctly in both Office 365 and in your on-premises directory.

Errant forwarding rule - Check for forwarding rules that aren't behaving as expected. A forwarding rule can be configured by an admin via mail flow rules or mailbox forwarding address settings, or by the recipient via the Inbox Rules feature.

Mail flow settings and MX records are not correct - Misconfigured mail flow settings or MX records can cause this error. Check your Office 365 mail flow settings to make sure your domain and any mail flow connectors are set up correctly. Also, work with your domain registrar to make sure the MX records for your domain are configured correctly.

Mail loop detected - This error also indicates that the receiving organization's email settings are misconfigured, creating a mail loop when a message is sent to an address that isn't found in their directory. This usually won't disrupt mail flow for recipients that actually exist, but the recipient's email admin should fix the misconfiguration to reduce the chance of any other mail flow issues. A common cause for this loop is that the recipient's domain is configured as "Internal Relay" when it should be "Authoritative." Another common cause for the loop is that both the sender and recipient are part of the same organization, but the sender's mailbox is hosted by Office 365, while the recipient's mailbox is hosted on-premises, and an outbound connector from Office 365 to the on-premises email servers is missing or misconfigured. To fix this, the recipient's email admin should create a correctly configured outbound connector in Office 365 to route the message to the on-premises mailbox.

For more information and tips to fix this problem, see Fix email delivery issues for error code 5.4.14 in Office 365<https://go.microsoft.com/fwlink/?LinkId=397497>.

Original Message Details
Created Date:   11/18/2025 9:50:53 AM
Sender Address: [email-masked]
Recipient Address:      [email-masked]
Subject:        Kurs om legionella och energiförluster i tappvattensystem

Error Details
Error:  554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [DB1PEPF000509FF.eurprd03.prod.outlook.com 2025-11-18T09:52:42.800Z 08DE245BFD7CC12B]
Message rejected by:    DB1PEPF000509FF.mail.protection.outlook.com

Notification Details
Sent by:        GVYP280MB0784.SWEP280.PROD.OUTLOOK.COM

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From: Svensk Energiutbildning <[email-masked]>
To: <[email-masked]>
Reply-To: <[email-masked]>
Subject: Kurs om legionella och energiförluster i
 tappvattensystem
Date: Tue, 18 Nov 2025 10:50:53 +0100
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Subject: Kurs om legionella och energiförluster i tappvattensystem
From: Svensk Energiutbildning <[email-masked]>
To: <[email-masked]>
Date: Tue, 18 Nov 2025 10:50:53 +0100

Legionella och energiförluster i tappvattensystemKurs om hur man förebygger och hanterar utbrott av legionella samt 
hur energiförluster minskas i nya respektive befintliga tappvattensystem. I kursen fokuserar vi på hur man förebygger legionella och hanterar utbrott om olyckan är framme. Eftersom förutsättningarna för legionella har en koppling till systemens energieffektivitet har vi slagit ihop frågorna i en och samma utbildning. Du lär dig vad legionella är, hur man mäter förekomsten, hur man minimerar riskerna och bekämpar utbrott. Vi går också igenom gällande lagstiftning som innebär stort ansvar för fastighetsägare. Energiförluster från tappvattensystem är ofta höga och en viktig förklaring är att dessa nästan alltid uppskattas med schablonvärde i projektering. I kursen lär du dig hur man mäter och beräknar förluster. Med fokus på VVC går vi igenom vilka åtgärder som kan vidtas i befintliga system och hur man styr upp såväl projektering som utförande i nybyggnad. Kursledare är Jonatan von Seth, en av landets ledande experter inom området.