Question about MX records

John vo at eudoramail.com
Mon Mar 8 16:54:57 UTC 2004


Hi all:

I have two mail servers:

IN    MX   10   server1 preferred.
IN    MX   20   server2 second choice.

My questions are:

1. What is considered failure? if server1 has a problem
   and gives the incoming connection "connection refused"
   message? will the sending mail server jump to server2
   then? how does the dynamic work?

2. If the DNS server that the incoming mailserver uses
   had cached the info including the old server1 info,
   will the mail server then keep trying it even though
   it's down?

Thanks,
J.


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