>>>>> "Greg" == Greg A Woods <woods@???> writes:
Greg> [ On Sunday, September 16, 2001 at 19:34:55 (-0400), Michael Richardson wrote: ]
>> Subject: Re: [Exim] DNSsec records and exim
>>
>> In fact, more basic. Missing '.' on MX record screwed things up.
>> I added an MX for lox.sandelman.ottawa.on.ca when I started to suspect
>> something was wrong. I will be removing it again tomorrow to see what
>> happens.
Greg> If you are using that name in either MAIL FROM: or RCPT TO:
Greg> parameters
Greg> you should probably keep an MX for it....
Why?
An A record can be delivered to. Some suggest that this wasn't the original
intention (no MX == no email), but it is how the spec is. And MAIL From:
will almost always have people's workstation in it, which may be very much
non-deliverable.
>> And nox6 does have records:
>>
>> marajade-[~] mcr 1028 %host -t aaaa nox6
>> nox6.sandelman.ottawa.on.ca has AAAA address 2002:c08b:2e21:3::6
>> nox6.sandelman.ottawa.on.ca has AAAA address 2001:410:402:3::6
>>
>> That should not upset anyone.
Greg> I'm not so sure about that. Any mailer should looks for the A RR
Greg> (not
Greg> AAAA) for every MX, and may complain if one is not found....
Then IPv6 will never get deployed if all machines must always be dual stack.
Greg> BTW, those AAAA records are apparently not visible to the world
Greg> either:
Greg> $ host -a lox6.sandelman.ottawa.on.ca nic.sandelman.ottawa.on.ca
NOX6.
(which is actually for "new lox"...)
Greg> !!! sandelman.ottawa.on.ca SOA primary istari.sandelman.ottawa.on.ca is not advertised via NS
Greg> $ /sbin/ping ns.flora.ottawa.on.ca
Greg> PING ns.flora.ottawa.on.ca (209.195.78.66): 56 data bytes
That's a different, more recent problem.
] ON HUMILITY: to err is human. To moo, bovine. | firewalls [
] Michael Richardson, Sandelman Software Works, Ottawa, ON |net architect[
] mcr@??? http://www.sandelman.ottawa.on.ca/ |device driver[
] panic("Just another NetBSD/notebook using, kernel hacking, security guy"); [
