How do you handle high bounce rates in cold email campaigns—do you use an email verification tool?

#121 · An Optimized Daily Regimen for AI Automation Agencies

How do you handle high bounce rates in cold email campaigns—do you use an email verification tool?

I use several email verification tools, but I don’t rely on them exclusively. Deliverability isn’t black‑and‑white; it’s a gradient where strong copy can offset a higher bounce rate. When I launch a campaign I prioritize volume and strong copy over upfront verification—great copy pushes results forward, while invalid emails pull them back. I also weigh the trade‑off of including links (which hurt deliverability) against adding customized assets that provide value; the latter often outweighs the former, which is why I recommend asset‑based outreach combined with strong copy. For high bounce‑rate pauses, I simply turn off strict verification and accept a higher bounce rate because my copy is strong enough to balance it. This isn’t optimal, but I favor speed and agility—getting campaigns live quickly—then later add validation (e.g., Mails.so, NeverBounce) once the offer is proven. Maker School offers 250,000 free verification credits for completing an application, which is worth checking out.

cold emailbounce rateemail verificationasset based outreach

Related answers

youtube ↗Cold Email

How do you deal with a cold email campaign that has high bounce rates?

When you see high bounce rates, the first thing to do is verify your email list. Depending on how you generated the list, you can use third‑party verification tools such as MailerCheck, ZeroBounce, or similar services that give you a deliverability score. Set a minimum threshold—if a contact falls below it, don’t send to them. Proper verification can eliminate roughly 50 % of bounces. I have free credits through Maker School and other deals, so you don’t have to pay a lot. My typical process is to send a small test batch of 1‑2 k emails to identify which niches or copy combinations perform poorly, then verify the good ones and scale the campaign. This way you only pay for verified emails that are likely to convert.

cold emailbounceverification

youtube ↗Cold Email

Why don't you verify your email lists, and do you think poor copywriting is causing low open rates?

I don’t verify the first email blast because I’m confident in my copywriting enough to tolerate a higher bounce rate; verification is a trade‑off—better copy reduces spam complaints, so you can accept more bounces. I typically run a quick, unverified campaign to test a market, and if it works I double down and then pay for verification.

email verificationbounce ratecopywritingtrade-off

youtube ↗Cold Email

Do you recommend using an email verification tool like Million Verifier in cold email?

Using raw Apollo scraped emails hurts deliverability, so it’s risky. I still do it sometimes to get campaigns up quickly, but I mitigate risk by using a cheap done‑for‑you mailbox provider (~$3.50 per mailbox). I launch campaigns fast, verify they work on the first send, turn off bounce‑rate pausing, and only start verifying email lists after I’ve confirmed initial interest. My first approach is always run‑and‑gun.

email verificationapollodeliverabilitymailbox provider

youtube ↗Cold Email

I recently started sending cold emails using leads from an Apify/Apollo scraper, and my Instantly campaigns keep stopping because bounce rates are too high. Is this an issue you run into, and how can I keep my lead list legit — preferably for free?

There are a couple of free email-validation alternatives, but they're not great — Lumbrid is one, though it's overly aggressive and flags a lot of good emails as bad. Depending on which Apollo/Apify scraper you're using, I'd recommend two things: pull personal emails alongside business ones (I weave both in and actually get a higher reply rate from personal addresses, and it lifts overall deliverability too), and either run an email verifier or just turn off the feature that auto-pauses your campaign at a bounce-rate threshold — Instantly will warn you it hurts deliverability, but on the campaign from my “watch me start and sell an AI service in 10 hours” video, I raw-dogged the Apify/Apollo export with zero validation and I'm still sitting at a 4% reply rate with healthy mailboxes. So you can just raw-dog it like I did.

bounce rateemail validationapollo scraperdeliverability