Enter a mail server hostname to probe. MailProbe opens a real SMTP connection, reads the greeting banner, and lists the capabilities the server advertises.
Only standard mail ports (25, 465, 587). No credentials are sent. How this works · Privacy policy.
Enter a hostname above and click Run probe. MailProbe will open a real TCP connection to the server, send EHLO, and report the capabilities the server advertises. No data is stored — results are ephemeral.