Web app · Oct 2026
DWM Email Checker
Check whether an email address can receive mail before you send: syntax, domain, mail servers, disposable and catch-all checks.
Visit live project
- Client
- Personal project
- Role
- Design & development
- Type
- Web app
- Started
- Oct 2026
- Stack
- Next.jsTypeScriptHeroUINode.jsDNSSMTP
Overview
Paste an address and DWM Email Checker validates the syntax, catches typos like gmial.com, looks up the domain's mail servers and provider, flags disposable, role and free-mail addresses, and checks SPF, DMARC and Gravatar, then gives a clear verdict with the reasons behind it.
Mailbox-level checks speak SMTP to the domain's mail server and stop before any email is sent. Vercel blocks the SMTP port, so I built that step as a small separate probe service that runs on any server with port 25 open. Bulk mode checks a whole list and exports CSV, and nothing you check is stored.
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