How to block one IP from accessing web mail

Hi
iPlanet Messaging Server 5.2 Patch 2
Recently a hackers who is using a particular IP log in into our users webmail and start to send spam all over the world.
FYI the user accounts use weak password, so that's why the hackers could log in easily.
My question is could I block that hacker's IP (one particular IP) from logging into our webmail..?
Thanks

AbuIqbal wrote:
iPlanet Messaging Server 5.2 Patch 2I suggest you upgrade.. or at least start planning on upgrading to a more recent release (e.g. Messaging Server 6.3). We aren't releasing any new patches/fixes for this release.
Recently a hackers who is using a particular IP log in into our users webmail and start to send spam all over the world.Messaging Server 6.3 provides the metermaid utility which can be used to throttle the number of emails users send via webmail -- an example on how to do this with the UWC/Communications Express interface (replacement to Messenger Express) is here:
http://msg.wikidoc.info/index.php/Rate-limiting_emails_sent_from_UWC
My question is could I block that hacker's IP (one particular IP) from logging into our webmail..?The mshttpd (webmail) process provides an IP level filter option (configutil -o service.http.domainallowed -v <filter>):
http://docs.sun.com/source/816-6009-10/security.htm#13295 (To Create Access Filters for Services)
Regards,
Shane.

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