Fall over mail server

From: Roy Kerwood (rkerwood@cityxpress.com)
Date: Thu Jan 27 2000 - 16:17:37 EST

I've setup a "secondary e-mail server, it is in the dns db files and set
with no rcphosts, how will the mail that is deliverd to it get picked up can
you point me to a howto of faq that talks about backup mail servers.

Here is what I think I know
1) In theory the backup mail server comes online and becomes effective after
the primary mail server has gone down or is no longer excepting incoming
mail. At that point secondary mail server becomes a receive only mail
server, by that I mean it receives the mail but does not try to forward it
to any recipients. That way mail is delivered, as far as the sender's
concern, but is not sent on to be individual mailboxes of the proposed
recipient. Again in theory as soon as the primary mail server is brought
back online and the mail is retrieved from the backup and delivered to the
2) Changes to the db.files
The db. Files contain the DNS information for our hosted sites..
cityxpress.com. IN SOA ns1.wtsearch.net. netadmin.cityxpress.com. (
                                                2000011701 ;
                                                10800 ;
                                                 3600 ;
                                                604800 ;
                                                86400 ) ;
cityxpress.com. IN NS ns1.wtsearch.net.
cityxpress.com. IN NS ns2.wtsearch.net.
cityxpress.com. IN MX 10 string.cityxpress.com.
cityxpress.com IN MX 20 symmerty.cityxpress.com --- secondary mail
cityxpress.com. IN A
www.cityxpress.com. IN A
string.cityxpress.com. IN A

Roy Kerwood
Network Administrator
Local 311

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