Mailchimp flagged your list (Omnivore): here's what actually happened

Omnivore is Mailchimp's pre-send screening system. Before your campaign goes out, it predicts how many addresses will hard-bounce or hit spam traps — and if the prediction is bad, it flags or suspends the audience. It doesn't tell you which addresses are the problem. That's the maddening part.

What triggers it

• Importing an old list that hasn't been mailed in months — addresses die at ~2–3% per month.
• A purchased or scraped list (these are also against Mailchimp's ToS — don't).
• Lots of role addresses (info@, sales@) and disposable domains.
• Typos from a signup form with no confirmation (gamil.com, hotmial.com).

Getting unflagged

• 1. Clean the list before you appeal. Remove invalid syntax, dead domains, disposables, and stale addresses. Mailchimp support will ask what changed — "I verified the list" is the answer they want.
• 2. Re-import only the clean segment. Start with people who engaged in the last 90 days.
• 3. Check your domain authentication too. Mailchimp now requires authenticated custom domains for decent deliverability.

MailMedic's $29 Rescue Kit cleans up to 10,000 addresses (invalid, dead-domain, disposable, and role accounts flagged) and audits your domain's SPF/DKIM/DMARC in one shot — no subscription, no account.