> Whoa, wait a min. If DNS is not resolving his hostname, then it's
> not returing ANY MX records so where the hell is the sender supposed
> to send the mail?
Hang on a second. The only un-resolvable address was for the primary MX
record (dsl-64-32-etc...). Shouldn't it try to delivery to the secondary MX
record in that case?
Jonas Fornander - System Administrator
Netwood Communications, LLC - www.netwood.net
Find out why we're better - 310-442-1530
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Len Conrad
> Sent: Monday, September 18, 2000 11:58 PM
> To: [EMAIL PROTECTED]
> Subject: RE: [IMail Forum] DNS and backup mailserver
>
>
>
> >If I stop my primary mailserver then my secondary correctly
> stores the mail.
>
> ok
>
> >But I have a DSL customer that runs his own mailserver (not MS Exchange).
> >His DNS looks like this (just like all the others):
> ><snip>
> >eurovat.com. IN A 63.209.65.120
> >eurovat.com. IN MX 10
> dsl-64-32-19-102.dsl.netwood.net.
> >eurovat.com. IN MX 20 linus.netwood.net.
> ></snip>
> >
> >When I got a DNS error and our DNS servers could not resolve his hostname
> >(dsl-64-32-etc...) then the mail bounced back to the senders.
> >
> >Why didn't it get stored in the backup mailserver?
>
> Whoa, wait a min. If DNS is not resovling his hostname, then it's
> not returing ANY MX records so where the hell is the sender supposed
> to send the mail?
>
> A lookup failure (no MX records) is always fatal for mail delivery.
>
> A lookup success (got MX records) with an MX machine failure triggers
> the attempted delivery to backup MX's.
>
> Len
>
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