Now, obviously, there's gonnabe a lotofreasonswhyAh, oneparticularservermaynotbereachableatanypointintime.
Andsotheideaisyouhavemultipleserversatmultipledifferent I p addressessothatiftheemailisn't abletogettothefirstmailserver, itgoes, thesecondmailservergoestothethirdmailserver, goestothefourthmailserverssoonandsoforthforhowevermanyemailserversyouhavesetup.
So I dobelieveifyouusesomethinglikeGoogleMapsandyouuseyourowndomainname, I thinktheygiveyoufiveorsixemailserversoyou'llgoinyourMXrecord.