Milter-greylist

At Tue, 17 Oct 2006 21:50:49 +0200,
manu@... wrote:
> 
> Brian J. Lewis <brianlewis@...> wrote:
> 
> > Maybe this is a clue?  Check this out, these are weird errors, its 
> > greylisting but its also erroring same time.  I can email you a GZIP 
> > of the log that has all this weird stuff in it if it will help.  
> > Maybe a corrupt greylist.db? Or just too large? (21 megs)
> 
> The "timeout before data read" simply means the milter stopped
> responding, probably because it crashed.
> 
> There are two usual suspects
> 1) DNS query with a thread-unsafe resolver (if you use DNSRBL or SPF)
> 2) system limit (ulimit) exhausted.

I frequently see temporary "timeout before data read" simply because
of high latency in lookuping SPF on my lesser traffic server. Brian's
server can possibly be consuming a long time due to latency in
lookuping DNSRBLs rather than deadlocking at somewhere.