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Configure Send Limits

TenantCore send limits help keep mailbox volume within the policy you define. The standard TenantCore operating model is up to 25 sends per mailbox per day.

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Open Send Limits

  1. Open Send Limits.
  2. Choose the tenant, domain, or mailbox scope supported by the current UI.
  3. Set the intended daily mailbox limit.
  4. Save the policy.

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Keep the sequencer limit aligned

If a mailbox is connected to a sending platform, configure that platform at or below the TenantCore limit. For example:
Do not configure the sequencer to intentionally exceed the infrastructure policy.

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How TenantCore enforces usage

TenantCore measures Microsoft 365 sending activity, compares mailbox usage with the configured policy, and applies Microsoft-side enforcement when the limit is reached. This means the infrastructure limit does not depend solely on the sending platform’s own daily-limit setting.

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Send limits are not deliverability guarantees

A mailbox can send fewer than 25 messages and still produce poor reputation signals. Monitor:
  • hard bounces
  • spam-related events
  • DNS/authentication health
  • reputation state
in addition to raw sending volume.