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Attachments delay mail delivery due to Safe Attachments scan

Dynamic delivery sends the body immediately, attachment follows after scan. No wait for users, scan still runs.

support/beveiliging/safe-attachments-dynamic-deliverysteps: 4

Try this first

  1. Defender > Policies > Safe Attachments
  2. Action: Dynamic Delivery
  3. Redirect blocked attachments to security-team mailbox
  4. Test with EICAR attachment or safe sample

When to bring us in

Workflows automating attachments, dynamic delivery sometimes breaks.

See also

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