dealing with dictionary attacks

[Steve Campbell]

Quoting Drew Marshall <drew at technologytiger.net>:

> On 9 Mar 2007, at 21:44, Steve Campbell wrote:
> 
> > How do we deal with dictionary attacks?

Damn, I forgot that smiley face again!!

Thanks, though Drew.

Steve.
> 
> With which MTA? Postfix does much of it by default. in_flow_delay is  
> one such feature:
> 
> # A Postfix process will pause for $in_flow_delay seconds before
> # accepting a new message, when the message arrival rate exceeds the
> # message delivery rate. With the default 50 SMTP server process
> # limit, this limits the mail inflow to 50 messages a second more
> # than the number of messages delivered per second.
> #
> 
> then you can also play with the smtpd_error limits, both hard and  
> soft and tailor those to suit your environment.
> 
> Other wise there's always the firewall or the pub either of which can  
> provide good short term relief :-)
> 
> Drew
> 
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