Constant Contact works better when the list going into the campaign is worth trusting.
That means cleaning before the send, not after the bounce report.
A practical workflow
- export the list or segment as CSV
- upload it to Verify List
- remove undeliverable
- review risky
- suppress or remove the weak addresses in Constant Contact
Why this matters
For many Constant Contact users, the audience includes:
- small business contacts
- nonprofit contacts
- older local mailing lists
- periodically imported CSVs
Those are exactly the environments where list drift builds up quietly.