SMTP
Using nc
to interact with an SMTP server:
kali@kali:~$ nc -vz example.com 25
Replace
example.com
with the domain or IP address of the SMTP server.Use port
25
for SMTP communication.
This command checks if the SMTP server on example.com
is reachable on port 25. The -v
flag provides verbose output, and the -z
flag makes nc
operate in scanning mode, checking for an open port without sending any data.
Using VRFY:
Issue the
VRFY
command to verify the existence of a user or mailbox. Replace "user" with the actual username you want to check.
VRFY user
Resources
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