MetaLogic MailVexa

MailVexa is a cross-platform desktop app (Windows + macOS) that cleans and verifies bulk email lists without uploading them to a server. Import CSV/XLSX/TXT and run multi-layer checks (format, disposable, MX, SMTP, mailbox, catch-all, SPF/DMARC), then export exactly the categories you need — Valid, Risky, Invalid, Unknown. Unlike SaaS verifiers, it's a one-time license: no monthly fees, no credit packs. Built-in proxy rotation and pause/resume make it ideal for agencies handling client data.