Subject: Undeliverable: Ny kurs: Värmepump som ersättning eller komplement till värmepanna eller fjärrvärme

From: <[email-masked]>
Date: Wed, 21 Jan 2026 11:20:32 +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, a connection to the remote server couldn't be made.

Contact the recipient by some other means (by phone, for example) and ask them to tell their email admin that it appears that your email system is unable to connecto their email system. 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 more information and tips to fix this issue see this article: https://go.microsoft.com/fwlink/?LinkId=389361.

Diagnostic information for administrators:

Generating server: GVZP280MB0872.SWEP280.PROD.OUTLOOK.COM
Receiving server: GVZP280MB0872.SWEP280.PROD.OUTLOOK.COM

[email-masked]
1/21/2026 11:20:32 AM - Server at GVZP280MB0872.SWEP280.PROD.OUTLOOK.COM returned '550 5.4.317 Message expired, cannot connect to remote server(SubjectMismatch. Expected Subject: *.byggtjanst.se. Presented Subject: CN=mail.protection.outlook.com, O=Microsoft Corporation, L=Redmond, S=Washington, C=US. Thumbprint: F2882262EDFEB841F332A84FD8FBB1B06BBFC393.)'
1/21/2026 11:10:31 AM - Server at byggtjanst.se (52.101.73.24) returned '450 4.4.317 Cannot establish session with remote server [Message=SubjectMismatch. Expected Subject: *.byggtjanst.se. Presented Subject: CN=mail.protection.outlook.com, O=Microsoft Corporation, L=Redmond, S=Washington, C=US. Thumbprint: F2882262EDFEB841F332A84FD8FBB1B06BBFC393.] [LastAttemptedServerName=byggtjanst.se] [LastAttemptedIP=52.101.73.24:25] [SmtpSecurity=-1;-1] [MM1PEPF00001515.SWEP280.PROD.OUTLOOK.COM 2026-01-21T11:10:32.333Z 08DE540887CF5475](SubjectMismatch. Expected Subject: *.byggtjanst.se. Presented Subject: CN=mail.protection.outlook.com, O=Microsoft Corporation, L=Redmond, S=Washington, C=US. Thumbprint: F2882262EDFEB841F332A84FD8FBB1B06BBFC393.)'

Original message headers:

From: Svensk Energiutbildning <[email-masked]>
To: [email-masked]
Reply-To: [email-masked]
Subject: Ny kurs: Värmepump som ersättning
 eller komplement till värmepanna eller
 fjärrvärme
Date: Tue, 20 Jan 2026 12:12:16 +0100
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Subject: Ny kurs: Värmepump som ersättningeller komplement till värmepanna ellerfjärrvärme
From: Svensk Energiutbildning <[email-masked]>
To: [email-masked]
Date: Tue, 20 Jan 2026 12:12:16 +0100

Ny värmepump med fokus
på prestanda och livslängdKurs om hur värmepumpar installeras för att hålla projekterad prestanda med tillåtna köldmedier under sin tekniska livslängd. Vid ersättning eller komplettering av fjärrvärme, värmepanna eller befintlig värmepump.