On 04/11/11 15:29, Rod Dorman wrote: > On Monday, April 11, 2011, 14:02:37, jeremy.als...@imap-mail.com wrote: >> ... >> There's no wisdom here, just what I've been told -- use a minimum of 2. >> All of the examples that I see have at least two MX records. >> One of the fellas at the user group who told us about PostFix wast >> talking about best -practices and put up a slide about this >> Symantec Brightmail Gateway (SBG) - Best Practices: New Deployments. >> http://www.symantec.com/business/support/index?page=content&id=TECH122730&key=53991&actp=LIST >> that says " You must have at least two MX records and then proper A and >> PTR record for each host that will handle email." > > The intent behind this suggestion is redundancy so when one is down > because of hardware/network issues or you're performing maintenance > there will be another box that can accept the mail. > > If you only have one physical box you've severely limited that concept. >
Our one MX can never be "down," only "interactive greylisting."
