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On an Exchange 2016 we would like to configure different security settings for approx. 250 Domains (Limit non delivery reports to these). A solution might be to configure a separate send connector for each of these domains.

  • Is there a problem configuring this amount of send connectors - maybe performance problems?
  • Is there a better way to achieve this than more send connectors?

Thanks for any advice or links concerning this.

An extensive search of the Internet doesn't give any useful results.

Wisseo
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  • "Is there a problem" - did you *test* this? Does a mail that you send to a reasonably responsive destination arrive within the second, or are the noticeable delays? – anx Nov 01 '22 at 18:09
  • "Limit non delivery reports" - why do you send a number of reports significant enough to warrant any special treatment in the first place? – anx Nov 01 '22 at 18:12
  • We don't send a significant amount of NDRs out. We want to prevent backscatter and information leackage due to security concerns. – Wisseo Nov 03 '22 at 08:44
  • Does the method help you to protect information? https://learn.microsoft.com/en-us/microsoft-365/compliance/create-test-tune-dlp-policy?view=o365-worldwide – Joy Zhang Nov 17 '22 at 07:37

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I have done some research, there seems no official blog on limits of send connectors we can configure in exchange server.

On an Exchange 2016 we would like to configure different security settings for approx. 250 Domains (Limit non delivery reports to these)

Maybe you can use transport rule to configure NDR. For example:enter image description here

Joy Zhang
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