Milter-greylist

Emmanuel Dreyfus wrote:
> On Wed, Oct 12, 2005 at 11:55:31AM -0400, Matt Kettler wrote:
> 
>>4) using the lazyaw option will also greatly reduce the number of entries, at
>>the expense of making it much easier to get past the greylist.
> 
> 
> 5) buy some RAM :o)
> 
> Seriously, 2 GB seems really huge to me. I'd be curious to learn how many
> message per day flow through this machine.

I'd guess quite a lot of messages. abo.fi is a university and Fredrik appears to
be one of their IT staff. and "The University has nearly 8000 students".


> The problem may be caused by
> a memory leak (in milter-greylist or in a library)
> 


I don't know.. Really, given the rate of dictionary attacks these days it
doesn't seem that unreasonable if you have no mechanisms to protect against them.

How big is an entry? 2 email addresses and 4-byte IP address? 40 bytes or so?

Based on that you're talking about 50 million entries. If you've got a 5-day
timeout that's only 10 million attempts per day. For a site with 8,000 users
that doesn't seem unreasonable.