On Wed, Jul 31, 2002, Lukas Vesely <vese...@compik.fd.cvut.cz> wrote:
Cituji z emailu od Bill Michell <bi...@mics.org.uk>:
This sounds like it could usefully be used as an option to configure;
--with-exhaustive-dns-traversal WARNING: enabling this option could lead to
an effective Denial of Service attack on your mail server if a remote
Yes, I agree - or more there could be a parameter that would contain a total
number of MX records to try before deferring the message. Because normally the
DNS server caches its records it got until the TTL expires - here we've seen
it's 1 hour at hotmail so there's no chance the message gets delivered in less
While an option like this might be worthwile pursuing, your assertion
that there's no chance the message will get delivered is absolutely
It's not that their configuration is broken and there is NO CHANCE of
connecting and delivering a message to any of the MX's listed.
It's that the MX's are valid but not accepting messages RIGHT NOW and
could very well accept messages the next second, next minute, next hour
or any time period in between.