They can be set to the same preference but not necessarily depending on what you want to do. You could load balance by setting the same MX preference.
You can protect some of your peers by only allowing connections from the main peers and not having them included in the MX records Lets say you have 6 peers but only a two of them have fat pipes, you include those two in the MX records and lets say the other 4 hosts are on DSL connections. You could run virus and spam filtering on the MX peers and only allow SMTP connections from the peers to the peers on the DSL connections. This is great for companies with branch offices and alot of users. There is definately a good amount of config flexibility with the peering Rick Davidson Buckeye Internet Inc www.buckeyeweb.com 440-953-1900 ext: 222 ----- Original Message ----- From: "Len Conrad" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 19, 2003 5:14 PM Subject: Re: [IMail Forum] More on Peering > > >You will need an MX record for each peer that you want to act as a > >backup. > > > >for example if you have 3 peers > >mail1.domain.com > >mail2.domain.com > >mail3.domain.com > > > >You point the primary MX record point to mail1.domain.com > >the secondary MX to mail2.domain.com > >and if you want add a tertiary MX record pointing at mail3.domain.com > > Shouldn't all the (peered) MXs be the same preference value? If you have > MX 10, 20, 30, then 10 will receive all mail and have re-deliver to 20 and > 30, while 20 or 30 receive no MX traffic, only the re-deliveries from 10. > > But if all are MX 10, then if one is down, the others will be tried, > maintaining load sharing and MX failover. > > Len > > _____________________________________________________________________ > http://MenAndMice.com/DNS-training: New York; Seattle; Chicago > IMGate.MEIway.com: anti-spam gateway, effective on 1000's of sites, free > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
