Les Mikesell wrote:
On Wed, 2006-09-20 at 05:12, abhishek singh wrote:
yes i am using SMTP Authentication , but when i m
doing telnet to my server on 25 port so i am able to
send mail by unknow user that in in not my mail server
like
mail from: <abs@xxxxxxxxxx>
this command is showing Sender is ok while its not
user in my mail server.after that
The stock Centos configuration should reject everything
that doesn't come from the localhost unless you make
changes to /etc/mail/access to permit it. Are you
doing this test from the local host?
Do you have telnet open to the outside world? If so kill it and only
allow ssh with the proper extra security setup. You may need to open
telnet for a little while for testing purposes, but don't leave it that way.
John Hinton
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