RE: How to prevent unauthorized use of my SMTP server?
- From: manju <manjunatha.bn@xxxxxxxxx>
- To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
- Date: Wed, 10 Aug 2005 17:20:50 +0530
On your SMTP vertual server apply relay restrication to " only the
list below" and check the option " Allow all computers which
successfully authenticate to relay regardless of list above "
This prevents unauthorized users from sending mails using your mail server.
Thanks
Manju
Messaging support -IBM.
On 8/8/05, Bruce J. Rose <brose@xxxxxxxxxxx> wrote:
> http://www.MSExchange.org/
>
> D0 not allow open relay, there are sites on internet that can test this.
> You can test by telnet 25 to your mail serer and try to send mail via
> command line commands.
>
> Bruce
>
> -----Original Message-----
> From: Nicolas Verhaeghe [mailto:nicolas@xxxxxxxxxxxxxxxxxxx]
> Sent: Monday, August 08, 2005 1:45 PM
> To: [ExchangeList]
> Subject: [exchangelist] How to prevent unauthorized use of my SMTP
> server?
>
> http://www.MSExchange.org/
>
> How do I make sure that my SMTP server is not open to the rest of the
> world?
>
> It seems that I need to have port 25 opened in my firewall to allow
> incoming mail, but when I do that, don't I risk letting outsiders use my
> SMTP to send their spam?
>
> How can I monitor this activity and also how can I make sure that no
> non-authenticated users use my Exchange server?
>
> Thanks a lot!
>
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--
Thank you
manju
Exchange administrator -IBM
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