How to separate risky and safe sending domains fast?

Identify affected assets:

• Check each domain in postmaster tools
• Check each IP on blocklists
• Review bounce patterns by sending source

Categorize:

• Affected: Poor reputation, blocklisted, high bounce/complaint
• Safe: Good reputation, clean blocklist status, normal metrics

Reroute critical traffic:

• Move transactional to safe infrastructure
• Update DNS/authentication as needed
• Test before full migration

Isolate affected:

• Stop or limit sending from affected sources
• Prevent contamination of safe assets
• Speed matters. Move critical traffic before problems spread.
• Quarantine damaged ships. Route essential cargo through healthy vessels.