Re: abused webmail

[Pavel Urban <urbanp@xxxxxx>]

Unfortunately, no. These guys are real users using legitimate accounts 
and resources. Because this is freemail, they can (and do) register 
hundreds of accounts and use them. Of course, we can prohibit account 
creation from outside our country, but we find this solution suboptimal.
P.U.

Paul Hutchings wrote:
> I know this is real easy to say but wouldn't you better off finding and
> fixing the exploit rather than dealing with it downstream?
>
> regards,
> Paul
> -----Original Message-----
> From: owner-postfix-users@xxxxxxxxxxx
> [mailto:owner-postfix-users@xxxxxxxxxxx]On Behalf Of columbo
> Sent: Wednesday, September 01, 2004 4:59 PM
> To: postfix-users@xxxxxxxxxxx
> Subject: abused webmail
>
>
> Hello,
>
> I would like to find some solution against spammers, who are abusing our
> webmail, based on Iplanet Messagging server. (or how do the SUN  call it
> now:)
> They (spammers) probably use some simple POSTing script through which they
> cram thousands of messages.
> There are postfix MTA servers in the frontend network and messages from
> backended webmail are forwarded to them. Presently we are not able to stop
> them right on the backend, we need to cut them down on the outgoing
> postfixes.  So what we need is to limit number of messages in for example
> five minutes, coming from one concrete address (webmail backend) and from
> one concrete user (From:webmailuser@xxxxxxx) together. 
> Any idea how to handle this? 
>
> Thank you for any help.
> Mesijeur Grygar