How to block a dictionary attack

[Eric Knudstrup]

ram wrote:
> I am seeing this pattern now very often. 
> Every weekend someone tries to gain unauthorized access to the my imap
> servers by trying random username / passwords 
>
> Yesterday by afternoon someone had tried half a million times on my
> servers from 62.141.37.141. I have written to the abuse contact
> address ... not that I expect any reply anyway
I use fail2ban which is nice, but I only serve through imaps and never 
see this.

Eric