open relay problem

[bmahesh]

Hello,
We are facing problem regarding open relay on DA mail server .
Anyone can configure our smtp server send mail, even we have tested [email protected]
it;s working .it's sending mail to outside. through outlook express.

How to stop such kind of relay.

Thanks in advance.

 

[nobaloney]

What version of exim.conf are you running; please post the first five lines of your /etc/exim.conf file.

Jeff

 

[Sam9999]

Open Relay

I have the some problem. Anyone can use mi SMTP.
Make white list maybe be is not possible because I have a dinamic IP adress and mi costumers have dinamic IP adress.
Here the cversio of /ect/exim.conf
# #
# This is version "RSS-1.0da" of the exim.conf file as distributed #
# by nobaloney.net.

The best, for me, is give a autenticated access with as user the email and as pwd the email pwd.

Otherwise I'll like to read more about how configure directadmin for allow only me and mi costumers to use the SMTP server on mi VPS.

Maybe for reduce the charge of smtp server, can I change this value? smtp_accept_max = 100 maibe to 10 or another value, it means that after 100 emails the smtp will block the IP?

 

[nobaloney]

You're using a very old version of the SpamBlocker exim.conf file. But even that one, by default, didn't allow open relay by default. However it does allow relay from an IP# for fifteen minutes after that IP# is used for a successful login in an attempt to receive email via the POP protocol. Once you're authenticated you can use any return address in your outgoing email. That's important; if you couldn't, then you couldn't (for example) direct replies to your yahoo account.

So perhaps you're confused and others cannot use your server, but you can because you're using POP to download email to your server.

In any event I highly recommend updating your server to the SpamBlocker version 3.1-beta version of the exim.conf file. The file, and instructions for installing it and making necessary changes to it, are found here.

Jeff