Subject: Undeliverable: Kurs om hur energiförluster minskas i VVC- och tappvattensystem

From: <[email-masked]>
Date: Sun, 7 Dec 2025 07:12:22 +0000

DU6PEPF0000A7E3.mail.protection.outlook.com rejected your message to the following email addresses:

[email-masked]<mailto:[email-masked]>
Your message couldn't be delivered because there is a partner connector configured that matched the message's recipient domain. The connector had either the RestrictDomainsToIPAddresses or RestrictDomainsToCertificate set.
For more information about this issue, see DSN code 5.7.1 in Exchange Online - Office 365<https://go.microsoft.com/fwlink/?LinkId=389365>.

DU6PEPF0000A7E3.mail.protection.outlook.com gave this error:
TenantInboundAttribution; Rejecting. Recipient has a partner connector with RestrictDomainsToIPAddresses or RestrictDomainsToCertificate set. Connector ID: 07e5b628-4478-4c6a-aa87-bfe372b53273. [DU6PEPF0000A7E3.eurprd02.prod.outlook.com 2025-12-07T07:12:22.474Z 08DE2EBC611EBBE7]

Diagnostic information for administrators:

Generating server: GV3P280MB0659.SWEP280.PROD.OUTLOOK.COM

[email-masked]
DU6PEPF0000A7E3.mail.protection.outlook.com
Remote server returned '550 5.7.51 TenantInboundAttribution; Rejecting. Recipient has a partner connector with RestrictDomainsToIPAddresses or RestrictDomainsToCertificate set. Connector ID: 07e5b628-4478-4c6a-aa87-bfe372b53273. [DU6PEPF0000A7E3.eurprd02.prod.outlook.com 2025-12-07T07:12:22.474Z 08DE2EBC611EBBE7]'

Original message headers:

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 (post.nuhet.se) smtp.remote-ip=85.118.203.81;  spf=pass
 smtp.mailfrom=post.nuhet.se;   dmarc=skipped
From: Svensk Energiutbildning <[email-masked]>
To: [email-masked]
Reply-To: [email-masked]
Subject: Kurs om hur energiförluster minskas i VVC- och
 tappvattensystem
Date: Sun, 07 Dec 2025 08:11:45 +0100
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Subject: Kurs om hur energiförluster minskas i VVC- och tappvattensystem
From: Svensk Energiutbildning <[email-masked]>
To: [email-masked]
Date: Sun, 07 Dec 2025 08:11:45 +0100

Legionella och energiförluster i tappvattensystemKurs om hur energiförluster minskas i VVC- och tappvattensystem 
samt hur man förebygger och hanterar utbrott av legionella.