What should I use to verify email addresses before sending emails in a B2B sales workflow?

For a B2B sales workflow, use a dedicated email verification service rather than trying to validate emails yourself.

Best options

Common tools include:

• NeverBounce
• ZeroBounce
• Kickbox
• BriteVerify
• Hunter Email Verifier

What to look for

Choose a tool that can:

• Check syntax and domain/MX records
• Detect disposable or temporary emails
• Flag catch-all domains
• Return a clear status like valid / invalid / risky / unknown
• Offer an API so you can verify leads automatically in your CRM or outreach tool

Important note for B2B

Email verification is helpful, but it’s not perfect:

• Some corporate domains are catch-all, so they may look “risky” even if deliverable
• Verification won’t tell you if someone is the right contact or if they’ll engage
• You should still focus on data quality, targeting, and compliance

Practical recommendation

If you want a solid default:

• ZeroBounce or NeverBounce for general use
• Hunter if you also want prospecting + verification in one place

If you want, I can recommend the best tool based on your stack, volume, and budget.