Pre-Send Deliverability Gate: Block Risky Campaign Launches by Domain

This is a preventive gate that runs at the moment a campaign is queued for launch. For every recipient domain in the target audience, it looks up the recent bounce and complaint history and decides whether that domain is currently safe to mail. Domains in a risky or paused state are held back from the send, while the rest proceed normally. The campaign owner gets an email listing precisely which domains were held, the reason, and the safe send volume that went out.

Use this when you want deliverability protection before damage happens rather than after. Instead of detecting a spike post-send, it stops you from mailing into a domain you already know is compromised, while still letting the healthy majority of the audience receive the campaign.

1. 1A campaign-launch webhook fires with the target audience.
2. 2Postgres returns recent bounce and complaint status for each recipient domain.
3. 3A logic step splits domains into safe-to-send and held.
4. 4Postgres records held domains and releases the safe segment for sending.
5. 5Gmail emails the campaign owner the held-domain report and safe volume.