John Levine wrote:
1. the greylisting plugin uses a lock on the dbm file to prevent the
processes from clobbering each other. the GL plugin could be
re-written to use an RDBMS instead, that might help.
I have a well-known greylist patch for qmail-smtpd that I recently
ported over to qpsmtpd.
It uses UDP queries to a small server written in perl, which has
rather nice performance since the perl server keeps the greylist data
in an in-memory hash, UDP is pretty cheap, so the server just handles
the requests as they arrive, no locking needed. It also means that if
you have a pool of servers they can efficiently share the greylist
database.
If interested, I can send you the plugin and the server.
Please share in general. IT sounds like a nice plugin.
Elliot
