Leo must never contact the wrong company. Three layers make sure of it.
1. Opt-out, always
Every email ends with a simple stop line and carries a standard unsubscribe header. If someone replies stop, or unsubscribes, they are never contacted again. This cannot be turned off.
2. Manual blocks
Say "don't contact X" in the chat, or use Never contact on a draft under To approve. The block is permanent.
3. CRM-based suppression
If you connect your CRM, Leo automatically suppresses:
- Existing customers, on both the email address and the whole company domain
- Open deals: companies you already have an active dialogue with
- Opt-outs: contacts marked as declined or do-not-contact
The suppression list updates when the CRM connection syncs.
Import from other tools
If you have unsubscribe lists from previous sending tools, import them as CSV and Leo respects them from day one.
Free email domains
Domain-level suppression never applies to free email domains like gmail.com, there only the individual address is blocked. Otherwise a single Gmail customer would block every Gmail address.