Haven’t emailed this list in a while? Clean it before you hit send

Old lists decay fast — the longer since your last send, the more addresses have gone dead. Upload your list and know exactly which ones are still safe to mail, in minutes.

Old lists don't age well

Every month a list sits unused, more of its addresses go dead, get recycled into spam traps, or simply stop existing.

~25%

of a list can go bad in a single year

Inactivity accelerates decay. As addresses go stale, your deliverability and sender reputation take a hit.

Bounce risk

Bounce-rate risk rises the longer since your last send.

Reputation

Sender reputation drops if you skip verification.

Four ways to get your list in

Our infrastructure is designed for high-integrity bulk cleaning. Choose the entry point that fits your current stack, and get clean, deliverable data in minutes.

STEP 01

CSV / XLSX

Upload a file

CSV, TXT, or XLSX — up to 25,000 emails per batch.

STEP 02

FAST COPY

Copy & paste

Paste addresses directly for smaller, one-off lists.

STEP 03

PROGRAMMATIC

Connect the API

Send lists programmatically for recurring cleanups.

Download results

Get a status-tagged file back — ready to filter and send.

STEP 04 · OUTCOME

A list you can actually trust to send to

Every address comes back clearly tagged – so you know exactly what to keep, what to drop, and what to double-check before your next campaign.

Status types

Trusted Security & Compliance Standards

ReachStream Email Verifier maintains rigorous security certifications and complies with major global data protection standards.

GDPR

Compliant

ISO

27001:2022

PIPEDA

Compliant

SOC 2

Type ll

DPDPA

Compliant

CCPA

Compliant

$0 for 30 days

100 verification credits to start.

Free Trial

$15 /mo

5,000 credits every month.

Starter

Growth

$39/mo

20,000 credits every month.

$79/mo

50,000 credits every month.

Pro

Custom

Volume pricing for high-scale lists.

Enterprise

Start free, pay only for what you verify

No subscriptions to babysit. Credits expire at the end of each billing cycle, upgrade, downgrade, or cancel anytime.

FAQ's

How do I clean an old email list?

Upload your list to ReachStream Email Verifier as a CSV file, up to 25,000 emails per batch, and each address is checked in minutes and returned with a status tag (Valid, Invalid, Risky, Catch-All, or Do Not Mail) so you know exactly which contacts are still safe to email.

How accurate is ReachStream’s email verification?

ReachStream Email Verifier delivers up to 99.8% accuracy on deliverable addresses, using syntax checks, domain and MX validation, and mailbox-level probing rather than a single-pass syntax check alone.

Does verifying an old email list hurt sender reputation?

No. Verification checks deliverability signals without emailing the addresses on your list, so it doesn’t affect your sender reputation. It protects your reputation going forward by flagging invalid, risky, and catch-all addresses before you send to them.

What file formats does ReachStream Email Verifier accept?

CSV file format, up to 25,000 email addresses per batch upload.

Do ReachStream Email Verifier credits expire?

Yes. Unused credits expire at the end of each billing cycle and don’t roll over. Free Trial credits are valid for the 30-day trial period.

Can I verify emails in real time, or only in bulk?

Both. ReachStream Email Verifier supports instant single-address verification for one-off checks and bulk CSV upload for cleaning larger lists at once.

Why do old email lists need to be re-verified before sending?

Email addresses decay over time as people change jobs, abandon inboxes, or get removed by their provider, so a list that was valid a year ago can have a meaningfully higher bounce rate today. Re-verifying before you send catches dead or risky addresses before they damage deliverability.

Ready to see what's actually in your list?

Upload it free – no credit card, no commitment. Know in minutes which addresses are still safe to send.