Email Address Regex Builder
The internet's worst-debated regex. This tool gives you the strict spec version and the practical version most production systems use.
/^[^\s@]+@[^\s@]+\.[^\s@]+$/
What HTML5 input type='email' uses. Allows almost any non-whitespace; catches typos; doesn't over-validate.
Made it. Now see what happens after you send.
Outsolvi tracks your email once it leaves your outbox: which opens were a person and which were a machine, who clicked, and who replied. Follow-ups stop on their own when someone answers. Outlook and Gmail, from $7/user/mo billed yearly.
Track your next sendToggle between strict, practical, and lenient. Outputs the regex with explanation of what each section matches and which edge cases it rejects.
When implementing email-format validation in your own code or in your CRM workflow rules.
FAQ
Can I validate emails with regex alone?+
Format-only. To know if an address actually exists you need an SMTP probe or an API check. Regex catches typos like 'no-at-sign'; nothing more.
Keep going
Articles, glossary entries, and other tools on the same topic.
Nate built Outsolvi after watching every email-tracking tool he had ever used lie to him about opens. Outsolvi grades every open as a person or a machine, in Outlook and Gmail, so the number on the dashboard is one a rep can actually act on.
We update these pages when the underlying mechanics change. new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.