At 02/09/2006, Pete Holsberg wrote:
How do you explain that, immediately after she gets the message, she
can open her browser and use URLs to surf. Yet when she goes back to
email, something she gets themessages again?
It may or may not be an issue with a slow response from the DNS
server. I was shooting in the dark and that was my first
guess. But, if it had attempted to resolve "mail.myisp.com" and
gotten no response, it may have cached that as a bad
address. Subsequent attempts to resolve the same address would
result in a "not found" message until that address was removed from
the cache. Other addresses that weren't in the cache would be
resolved by the DNS server, which is why some address might work and
others not.
I think there's another tweak to turn off DNS caching altogether; it
may also be mentioned on the Navas Group site, but I don't
recall. If you turn it off and the problem goes away, that would
definitely point to a caching issue. If she is using dialup, always
resolving from the server might slow things down, but it would likely
be negligible, assuming her ISP doesn't have chronic problems with
the server response times. If she's using broadband, it shouldn't be
much of an issue, unless of course, they are having chronic problems
with the server.
"Ipconfig /displaydns" will show what address (along with some other
info) are actually in the caches at any given time. That may or may
not prove useful in helping you diagnose the problem.
--
Tony Lowe, The HapMaster
What if the hokey-pokey really is what it's all about?
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