✓AllianzaBiz Verify
Ask the mail server before you hit send.
- DNSMX acme-corp.com → mx1.acme-corp.com
- SMTPEHLO verify.yourdomain.com
- MAIL FROM:<check@yourdomain.com>
- RCPT TO:<x7k2q9@acme-corp.com>550 5.1.1 User unknown — not a catch-all
- RCPT TO:<priya@acme-corp.com>250 2.1.5 OK — mailbox exists
- QUIT no email is ever sent
Syntax · DNS · mailbox · catch-all · disposable · role