Azure Communications and Email Services Spam Filtering

Matthew Sykes 116 Reputation points
2022-11-08T16:35:06.653+00:00

I have been playing around with the Azure Email Services as it seems like a good solution (once out of preview) for automated emailing from Function Apps.

Everything seems to be setup correctly,

  • I have a verified custom domain
  • All DNS entries are setup for SPF/DKIM
  • Sender name and address configured
  • I have connected the domain to a Communications Service

Manually sending an email through a test app (WPF and Azure SDK with connection string) works fine and the email arrives/is signed

As soon as I automate the process and use a queue triggered function to send the email, I hit issues. The email sends fine but Exchanges default policies quarantine the message as spam under the phishing category.

Has anyone else encountered this? I am not really sure how to proceed really as the email is being signed and verified.

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Exchange Online
A Microsoft email and calendaring hosted service.
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Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
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