qmail doesn't do VRFY/EXPN. It just says:

eric@dream:~ > telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 mail.erictech.com ESMTP
VRFY
252 send some mail, i'll try my best



Irwan Hadi wrote:
> 
> At 01:43 AM 7/16/00 -0400, [EMAIL PROTECTED] wrote:
> >   is there any way by which i can tell qmail to first check for that UID in
> >
> >LDAP directory server before accepting mails ??
> 
> I think it is the right behaviour, otherwise, spammer can collect valid
> username at your server, for example by using command EXPN or VRFY, right ?
> And you don't want this to be happened right ?

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