Ted Cooper <[EMAIL PROTECTED]> (Mi 05 Mär 2008 16:36:39 CET): > I have played with DNS timeouts before but that was with dig/host and > not Exim. I tend to like delays in my mail server since they seem to > make bots fall off. > > The bind resolver timeout seems to be 5 seconds, but both dig and host > can change that timeout with a command line option. The Exim docs don't > seem to mention being able to change the DNS timeout and it's far too > late to be poking my nose into the code.
Yes, it's default is 5 seconds, multiplied with the attempts (default: 2), as
documented in resolv.conf(5). (values found on Debian GNU/Linux 4.x)
In /etc/resolv.conf you might have
options timeout:5 attempts:1
it seems to work (but only I tested it with other applications, not with
exim).
Could be could if there would be a individual timeout in the exim
operation - for black/greylisting it could be shorter than for critical
lookups.
--
Heiko
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