Peter J. Holzer wrote:
For those interested, if basic laws of operations research, physics,
science and Thermodynamics isn't good enough, then Believe Sendmail!
The ConnectionCacheTimeout ( K) option specifies the maximum time
that any cached connection will be permitted to idle. When the idle
time exceeds this value the connection is closed. *This number
small (under ten minutes) to prevent you from grabbing too many
from other hosts. The default is five minutes.*
I'm not sure what you are arguing here. That five minutes is a
reasonable idle time for connection caching? That there are MTAs with
ridiculously long defaults?
I guess I am disappointed that the focus was lost here. The initial
problem of causing delays and resource issues on the receiver to one
where its "OK" as long as we fine tune it.
Producing a Tuning doc is fine, but it should not the key focus of
using this to continue abusing receivers in unauthorized and
undesirable ways. It doesn't matter what a client thinks what it good
or bad - its what the receiver thinks. It has absolutely nothing to do
with "mainstream" systems or not - that mentality continues to hurts
groups like this. Gets us no way and never solves problems across the
board for the entire community.
I can only see an SMTP extension that exposes a permission token,
CSHARE=#, perhaps that allows a receiver to allocate the channels it
wants to allow for these special connections without degradation the
system loading limits and also not hurting other clients from getting in.