EXPN Mail Server Detection Scanner
Online EXPN Mail Server Detection Scanner
Short Info
Level
Low
Single Scan
Single Scan
Can be used by
Everyone
Estimated Time
5 seconds
Time Interval
2 months 3 days
Scan only one
Domain, IPv4, Subdomain
Toolbox
-
The SMTP "EXPN" command allows you to expand a mailing list or alias, to see where mail addressed to the alias actually goes. For example, many organizations alias postmaster to root, so that mail addressed to postmaster will get delivered to the system administrator.
An attacker might use the disclosed information to harvest specific security vulnerabilities for the application identified.
