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MailSift
Email verification for developers, in one fast API call
MailSift helps developers stop invalid, disposable, relay, typo, role-based, and risky emails before they enter a product or campaign. One API response combines 15+ checks with a 0–100 trust score in under 100 ms. Verify a single address, process CSV lists, or integrate through the API. Start with 500 free checks; paid credits never expire.
Hey Product Hunt 👋
MailSift is built around a simple idea: developers should be able to decide whether to trust an email address without stitching together DNS lookups, disposable-domain lists, and brittle rules.
One API call checks syntax, MX records, disposable and relay providers, role addresses, domain age, SPF/DMARC, typos, catch-all behavior, and more. The result includes structured signals plus a 0–100 trust score, typically in under 100 ms.
You can verify single addresses, clean CSV lists in bulk, or integrate directly into signup and lead workflows. Start with 500 free checks, and purchased credits never expire.
I’d especially love feedback on the API response, trust scoring, and which integration you’d like us to build next. Thanks for checking out MailSift!
Finally something that catches the typo emails I keep getting in my signups. The trust score idea is genuinely useful for deciding what to do with borderline addresses.
Email verification is crowded, so speed alone won't win. What's the advantage you expect developers to remember six months after integrating MailSift?
One thing I'd love to see is a webhook option for batch CSV jobs, so I can kick off a list upload and get pinged the moment it's done instead of polling for status. That would make it way easier to plug into our existing pipelines.
It would be super useful if the API response could flag whether an email belongs to a free provider like Gmail or Yahoo separately from the risk score, since that distinction matters a lot for B2B vs B2C campaigns and currently requires a separate lookup.
About MailSift on Product Hunt
“Email verification for developers, in one fast API call”
MailSift was submitted on Product Hunt and earned 8 upvotes and 5 comments, placing #145 on the daily leaderboard. MailSift helps developers stop invalid, disposable, relay, typo, role-based, and risky emails before they enter a product or campaign. One API response combines 15+ checks with a 0–100 trust score in under 100 ms. Verify a single address, process CSV lists, or integrate through the API. Start with 500 free checks; paid credits never expire.
MailSift was featured in Email (36.7k followers), API (98.4k followers) and Developer Tools (516.2k followers) on Product Hunt. Together, these topics include over 95.3k products, making this a competitive space to launch in.
Who hunted MailSift?
MailSift was hunted by Freddie Developer. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how MailSift stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Freddie Developer