On Wed, 31 Aug 2005, Richard Clayton wrote: > >I thought about recording the first seen HELO from an IP address to a > >database. If that IP connects and uses a different HELO, it gets > >blacklisted and thus useless. I have not tried it though. > > This will -- in practice -- give you the wrong result with NAT, with > dynamic address space, and with anyone who runs more than one piece of > software.
And with any host that supports multiple domains and adjusts its HELO to suit the current domain. -- Philip Hazel University of Cambridge Computing Service, [EMAIL PROTECTED] Cambridge, England. Phone: +44 1223 334714. Get the Exim 4 book: http://www.uit.co.uk/exim-book -- ## List details at http://www.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://www.exim.org/eximwiki/
