Enabling the SMTP VRFY command

The SMTP VRFY command can be used to verify an email username. When asked to validate a username, a receiving mail server responds with the user’s login name. The SMTP VRFY Command section on the page Settings > Inbound/Outbound > Connection Control is used to configure this option.

Important: Use this command with care. Although helpful in validating a user, this command can also create a network security issue if the user information is retrieved by someone with malicious intent.

Steps

  1. Navigate to the page Settings > Inbound/Outbound > Connection Control.
  2. From the section SMTP VRFY Command Option, mark the check box Enable SMTP VRFY command.
  3. Click OK.
    The settings are saved.