Subject: Undeliverable: Lär dig energieffektivisera byggnadens installationssystem

From: <[email-masked]>
Date: Fri, 16 Jan 2026 11:14:27 +0000

Delivery has failed to these recipients or groups:

[email-masked]<mailto:[email-masked]>
Your message wasn't delivered. Despite repeated attempts to deliver your message, the recipient's email system refused to accept a connection from your email system.

Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that their email system is refusing connections from your email server. Give them the error details shown below. It's likely that the recipient's email admin is the only one who can fix this problem.

For Email Admins
No connection could be made because the target computer actively refused it. This usually results from trying to connect to a service that is inactive on the remote host - that is, one with no server application running. For more information and tips to fix this issue see this article: https://go.microsoft.com/fwlink/?LinkId=389361

Diagnostic information for administrators:

Generating server: GVYP280MB0560.SWEP280.PROD.OUTLOOK.COM
Receiving server: GVYP280MB0560.SWEP280.PROD.OUTLOOK.COM

[email-masked]
1/16/2026 11:14:27 AM - Server at GVYP280MB0560.SWEP280.PROD.OUTLOOK.COM returned '550 5.4.316 Message expired, connection refused(Socket error code 10061)'
1/16/2026 11:04:09 AM - Server at mail.vasakronan.se (185.29.113.247) returned '450 4.4.316 Connection refused [Message=Socket error code 10061] [LastAttemptedServerName=mail.vasakronan.se] [LastAttemptedIP=185.29.113.247:25] [SmtpSecurity=-2;-2] [GVX0EPF000420B4.SWEP280.PROD.OUTLOOK.COM 2026-01-16T11:04:27.160Z 08DE544632F5A12C](Socket error code 10061)'

Original message headers:

From: Svensk Energiutbildning <[email-masked]>
To: [email-masked]
Reply-To: [email-masked]
Subject: Lär dig energieffektivisera byggnadens
 installationssystem
Date: Thu, 15 Jan 2026 12:12:20 +0100
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Subject: Lär dig energieffektivisera byggnadens installationssystem
From: Svensk Energiutbildning <[email-masked]>
To: [email-masked]
Date: Thu, 15 Jan 2026 12:12:20 +0100

Installationsteknisk energieffektiviseringKurs om hur man driftoptimerar och energieffektiviserar byggnader 
med installationstekniska åtgärder.