Email Deliverability: Guides, Benchmarks & Best Practices
How to keep bounce rates low and your sender reputation intact, so your email lands in the inbox. Guides and benchmarks for B2B senders.
15 pages, grouped below by the job they do.
All resources
i•••••@d•••••.aiVerified
y•••••@s•••••.ioVerified
a•••••@g••••.appLikely valid
hello@wellsaidlabs.comRisky
b.trask@radar.coInvalid
Start with these four pages, in this order.
What verification checks, how to hold a bounce rate under 2%, the 2026 benchmarks to measure yourself against, and where validation ends and verification starts.
- Definition
What Is Email Verification?
How an SMTP check confirms a mailbox exists without sending it anything.Read - Guide
How to Reduce Email Bounce Rate
How to keep bounce rates under 2% and protect your sender reputation.Read - Guide
Email Deliverability Benchmarks 2026
Bounce rates, open rates and inbox placement, benchmarked.Read - Guide
Email Verification vs Validation: What's the Difference?
What each one checks, and when each matters.Read
Every page we have on deliverability.
15 entries across 5 groups. Each row says what kind of page it is and what is on it before you spend a click.
Getting started
What verification checks, in one page.
1 entryHow-to guides
Long reads on bounces, finding emails and getting replies.
4 entries- GuideHow to Reduce Email Bounce RateHow to keep bounce rates under 2% and protect your sender reputation.
- GuideEmail Verification vs Validation: What's the Difference?What each one checks, and when each matters.
- GuideHow to Find Anyone's Work EmailLegitimate ways to find a verified B2B work email.
- GuideWhy Your Sales Emails Aren't Getting RepliesWhy reply rates drop, with data, and what to change.
Benchmarks & data
Bounce, open and reply rates to measure yourself against.
2 entriesTools
Cleanlist AI products, and how they compare.
2 entriesKey concepts
Short glossary definitions.
6 entries- DefinitionEmail VerificationConfirming a mailbox exists and can receive mail via SMTP.
- DefinitionEmail ValidationChecking format, domain and deliverability, one layer at a time.
- DefinitionCatch-All EmailDomains that accept all mail, and why that makes verification harder.
- DefinitionEmail Bounce RateHard and soft bounces, and what each does to sender reputation.
- DefinitionDeliverability ScoreA prediction of whether your email lands in the inbox or in spam.
- DefinitionEmail DeliverabilitySender reputation, authentication and list quality, together.
Verify the address, then sync it to the tools you send from.
Cleanlist AI checks an address before it reaches your list, then syncs the clean record two ways with HubSpot, Salesforce and Pipedrive, or pushes it one way to Outreach, Salesloft and Lemlist.
- 98%verified work email on a 500-lead benchmark
- 0.5credits to validate one address
- 25+data providers behind a single lookup
- 6integrations, three of them two-way
HubSpot
Salesforce
Salesloft
LemlistCommon questions
What is a good email bounce rate?
For B2B outreach, keep your bounce rate under 2%. Above 5%, your sender reputation is at serious risk. Verifying the list before you send is the surest way to stay under 2%.
What's the difference between email verification and validation?
Email verification checks that a mailbox exists and can receive mail, through an SMTP handshake. Validation checks format and syntax, meaning whether the address is well formed. Verification needs a network check. Validation can run on the client side with no network call.
How often should I verify my email list?
Verify before every major campaign, and every quarter for ongoing sequences. B2B email data decays at roughly 30% a year as people change jobs, so re-verify any list older than 3 months.
Clean the list before the campaign.
14 days of Pro, free: 250 credits, 3 seats, agents, Sequences and Clu in Slack. Validation is half a credit an address, so the trial covers 500.
Every Pro feature is on. The Free plan stays at 50 credits a month.