How a B2B SaaS team cut fake signups and protected onboarding email
A representative scenario showing how a B2B SaaS product used real-time verification to block disposable signups and protect onboarding deliverability.
90%+
fewer fake signups
Under 2%
onboarding bounce rate
Cleaner
activation metrics
The challenge
Free-trial signups were full of disposable and mistyped email addresses. Fake accounts inflated activation metrics, wasted infrastructure, and never converted. Onboarding and password-reset emails to invalid addresses pushed up bounce rates and started landing in spam.
The solution
The team added the Mailthentic API to their signup flow, verifying each address in a couple of seconds and rejecting disposable and invalid emails before an account was created. They also bulk-verified their existing user base to clean out dead addresses ahead of lifecycle campaigns.
Frequently asked questions
How is signup verification added?
Does it slow signups down?
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