Rapid7 Vulnerability & Exploit Database

SMTP User Enumeration Utility

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SMTP User Enumeration Utility

Created
05/30/2018

Description

The SMTP service has two internal commands that allow the enumeration of users: VRFY (confirming the names of valid users) and EXPN (which reveals the actual address of users aliases and lists of e-mail (mailing lists)). Through the implementation of these SMTP commands can reveal a list of valid users.

Author(s)

  • Heyder Andrade <heyder@alligatorteam.org>
  • nebulus

Development

Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/scanner/smtp/smtp_enum
msf auxiliary(smtp_enum) > show actions
    ...actions...
msf auxiliary(smtp_enum) > set ACTION < action-name >
msf auxiliary(smtp_enum) > show options
    ...show and set options...
msf auxiliary(smtp_enum) > run

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