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Unsure whether to keep catch-all or set explicit aliases

Catch-all (anything that does not exist routed to one inbox) looks convenient but is a spam magnet and hides typos in real addresses. Explicit aliases are more work but much quieter and safer. For SMB, aliases nearly always win.

Try this first

  1. 1Inventory aliases you actually use: info@, sales@, hr@, support@, billing@, gdpr@. Keep it under 10.
  2. 2Disable catch-all in M365/Workspace, and configure only those aliases as shared mailboxes or aliases on a single user.
  3. 3For SaaS signups: use plus-addressing (you+slack@vectel.nl) instead of a disposable alias per tool.
  4. 4Document which alias maps to which person/group, schedule a yearly review.
  5. 5For inbound phishing: set DMARC to p=reject so spoofing your aliases does not even arrive.

When to bring us in

If you have a 15-year-old catch-all flooded with spam and want to replace it without losing real mail, we can plan a phased decommission.

See also

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