Hi,

Anyone knows how to prevent mailbombing?

One of users in our server has been mailbombed
which makes the server down.

Any ideas?

Thanks for your reply.

Anto.

There is a patch to iptables that can do connection limit per IP. My headache is that how can I prevent local users from sending mailbomb through http scripts.

If you can, set a limit of no more then 200 or so e-mails that can be received in a day per user.

I run courier-maildrop which can limit number of messages per user but when it reach its limit, the next incoming messages will start to bounce which start to full local queue esp. when the sender fake its address to an undeliverable one. I hope I would find beter software/setting that can reject over quota recipient at SMTP port.