Snov.io Campaign Paused for High Bounce Rate: the 15% Rule and How to Reactivate

What Snov.io's knowledge base says

From Snov.io's knowledge base, read 8 November 2026:

• How to reduce email bounce rate: "If the bounce rate for the last 100 sent emails reaches 15%, the campaign will automatically pause." It recommends sending only to valid (green) addresses, and re-verifying an address if "you verified it more than 30 days ago". It says the "Don't send to email addresses that have bounced before" option is on by default.
• Campaign statuses: this status "indicates that Snov.io has paused your campaign due to a high bounce rate, exceeding the threshold of 15%. To reactivate your campaign, resolve the issue and request reactivation through customer care chat."

Because the rate is measured over the last 100 emails, a single bad batch at the start of a campaign is enough to trigger it.

Step 1: find out what bounced

Open the campaign's recipients, filter by Bounced, and read a sample of the bounce messages:

• "User unknown", "no such user", 550 5.1.1: bad addresses. The list is the problem.
• "Blocked", "policy", "spam", "authentication": your sending setup or reputation. Check SPF, DKIM and DMARC with the cold email domain checker before you send anything else.
• "Mailbox full", "try later": soft bounces. Retry later and suppress repeats (remove repeat soft bounces).

The bounce message analyzer sorts pasted bounce text into these groups.

Step 2: clean the remaining recipients

1. Export the campaign's prospect list. The Snov.io export to email list tool extracts the emails.
2. Drop anyone already contacted or bounced, and dedupe with remove duplicate emails.
3. Upload to the verify page for a live SMTP check.
4. Keep valid rows in the campaign. Remove invalid ones and add them to your do-not-email list.
5. Move risky catch-all rows into a separate, slower campaign. SimpleVerifier reports them risky with a grade and the reason, never valid (catch-all scoring).

Then contact Snov.io customer care, explain what you removed, and ask for reactivation.

Step 3: start the next campaign clean

• Verify before upload, not after. A list from any finder, Snov.io's included, can be weeks old by the time it's sent.
• Keep "Don't send to email addresses that have bounced before" turned on.
• Lower daily limits on new inboxes and spread volume across more of them (cold emails per day per inbox).
• Pause a campaign yourself at 2% hard bounces. Most platforms that publish a bounce setting sit far lower than Snov.io's 15% (bounce rate thresholds by platform).

What checking costs

• Starter, $9 a month: 2,500 checks.
• Pro, $39 a month: Unlimited email verification.*
• Business, $99 a month: the first 300,000 checks a month at full speed, 5 seats.
• Agency, $249 a month: the first 750,000 checks a month at full speed, 15 seats, client workspaces.

*Pro fair use: the first 100,000 checks a month at full speed, then slower, never cut off. See pricing. Check your list free: 100 checks with a Google sign-in, no card.

More reading: clean a Snov.io export, what to do after a high bounce rate, restart sending after a block, and verify your list before cold email.