Email Verification Built Into Your Cold Email

Alienmail checks your lead list before every send, right inside your campaign. Bad addresses come off before they bounce, so your sender reputation stays healthy and more emails reach real people.

  • Runs before every send
  • No separate verifier
  • No export and re-import
  • Always free
An email list with valid addresses kept and a misspelled one removed

Why a Clean List Decides Whether You Reach the Inbox

Inbox providers watch how many of your emails bounce. When too many addresses are dead, they treat you as a careless or fake sender and start sending your mail to spam, even to the valid addresses on your list. Keeping hard bounces under 2% is the single easiest way to protect a sending domain, and verification is how you get there.

Hard bounce rate dropping from 5.8% before verifying to 0.8% after Alienmail checks the list, under the 2% safe limit

No Separate Verifier, No Export Dance

With most tools, cleaning a list is its own chore: export your leads, upload them to a verifier like ZeroBounce, wait, download the clean file, then re-import it into your sender. Alienmail runs verification inside the campaign, right before it sends, so you skip all of that. You upload your list once and Alienmail removes the bad addresses for you.

Five manual steps with most tools, export, upload to a verifier, wait, download, re-import, next to Alienmail where you upload once and the list is verified before every send

How Alienmail Verifies Your List

Alienmail runs each address through a series of checks and removes or flags the ones that would bounce or hurt your reputation.

1

Format check

Catches typos, bad characters and misplaced @ signs.

2

Domain check

Confirms the domain exists and can receive mail (MX records).

3

Disposable filter

Removes temporary and burner addresses.

4

Mailbox check

Confirms the mailbox exists, without sending it a message.

5

Catch-all and spam-trap detection

Flags risky addresses and known traps.

6

Role and risk scoring

Flags role addresses like info@ and sales@ so you can decide whether to keep them.

Alienmail vs Standalone Email Verifiers

Standalone verifiers charge per batch and sit outside your sender. Alienmail runs the same checks inside the campaign.

AlienmailZeroBounceNeverBounce
Where it runsInside your campaign, before sendSeparate appSeparate app
Export and re-importNoYesYes
PriceAlways freeFrom $39 for 2,000 emails, pay as you go$8 per 1,000 emails, pay as you go
Also sends your cold emailYesNoNo

Pay-as-you-go prices from each tool's pricing page, checked 27 October 2026. ZeroBounce also sells a $99/mo subscription, and NeverBounce a $49/mo plan for up to 10,000 emails.

Prices checked October 2026

What Verification Can and Can't Catch

Verification removes most dead addresses, but no verifier catches every one. Some mail servers hide whether a mailbox exists (greylisting), and a catch-all domain accepts everything, so it can't be fully checked. Alienmail flags these as risky rather than guessing. The honest goal is to cut your bounce rate well under 2%, not to promise zero bounces.

Email Verification FAQ

Email verification checks whether an address is real and can receive mail, without sending it a message. For cold email, it means removing dead addresses from your list before you send, so they don't bounce.

Send to a Clean List, Every Time

Verification runs before every send. Always free, no separate tool.