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The key in sendmail.cf is:
O PrivacyOptions=goaway
if you change this in sendmail.cf people around the world can do the
following steps in your mail server:
telnet <your-server> 25
and make
vrfy <name_of_user>
if the server responds
expn <name_of_user>
means that the user exists on the server
;)
Paulo Henrique Rodrigues
e-mail: pauloh@xxxxxxxxxxxxxxxx
Corporate
IT Support
Infortron - Assistência Técnica e Comércio Ltda
visit us at: http://www.infortron.com.br/linux
+55
(15) 3237.9200 - Sorocaba/SP/Brasil
----- Original Message -----
Sent: Friday, February 06, 2004 12:57
PM
Subject: Email users
Hello,
I have a question about sendmail and mail in
general.
I want to know is it possible to know
if there are some specific users in some
specific servers.
for example On mydomain.com I have user myuser@xxxxxxxxxxxx, and people from
outside want to know if this user exists or not ?, so how can they do that
?. I mean to know this, without sending email. Otherwise they can
send email, and if the mail does not come back, It means the
user exists :).
Thanks in advance.
Rudolf.
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