I'm having a new experience with our mail server. Suddenly I'm getting
numerous dictionary attacks from different IP addresses. At first I blocked
the IP addresses in IMail SMTP Security, but after adding a dozen I got
tired. I'd rather detect the pattern and automatically stop it that way. Any
Keith,
I've been seeing a sharp uptick in this sort of activity as well.
Typically they include about 200 generic E-mail addresses, but some are
now throwing thousands of addresses for a fuller attack. If the E-mail
is going to a locally hosted domain, the best defense is to remove the
One other thing. Unless you have a ton of traffic (~100,000/day) or
have people doing BCC blasts from your server to hundreds of addresses,
there is a setting in IMail 8.x that can slow down the dictionary attack
so that it doesn't threaten your server's ability to process E-mail.
On the SMTP
On 18 May 2004 at 12:45, Matt wrote:
Very slick Matt great idea!
-Nick Hayer
One other thing. Unless you have a ton of traffic (~100,000/day) or
have people doing BCC blasts from your server to hundreds of
addresses, there is a setting in IMail 8.x that can slow down the
dictionary
