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Re: [linux] commandes SMTP



> From: Frederic Detienne <fd@cisco.com>
> 
> expn donne l'expansion d'un alias. En gros, tu peux essayer plein de
> truc (expn fdetienn, expn fbadel,...) et le mail server te dit si le
> nom existe et qui c'est.
> 
> debug permet d'executer une commande arbitraire sur le serveur.
> 
> wiz a une petite histoire:
> -8<----
>  Older versions of sendmail allowed  a person to connect to the SMTP
> port 25 with Telnet and type  "WIZ" and a password, then get a shell
> from which they could enter  commands. A bug allowed someone to type
> no password, which would be accepted as a real password. The was one
> of the exploits  the Morris Worm of 1988 used  to spread. Because of
> this worm, the hole was patched in almost all systems and was gone a
> few years later. It is unlikely that any system is vulnerable today.
> -8<----
> 
> vry, je sais pas.

help vrfy
214-VRFY <recipient>
214-	Verify an address.  If you want to see what it aliases
214-	to, use EXPN instead.
214 End of HELP info

-- Arnaud

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