Adding an MX record early?

I have to change our public IP's this week, I was wondering if I could add an mx record early to avoid the 24-48 propagation time? I think I know the answer already, just wanted to see if there is an easier way to switching it over. Thanks.
j_crow1Asked:
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Chris MillardConnect With a Mentor Commented:
There should be no problem in adding an MX record early. Make it so that the new record has a higher priority than your existing. When people send in emails, if the highest priority MX server is unavailable, then the mails should route to the next highest.
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chakkoConnect With a Mentor Commented:

As roybridge says, if the first MX record doesn't respond then the next MX record will be tried.

lower number = higher priority

MX record value 10 is higher priority / preference than MX record value 20

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j_crow1Author Commented:
Thanks guys!
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Suliman Abu KharroubIT Consultant Commented:
no need to change MX record.

only change the A record where the MX record points...
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j_crow1Author Commented:
Sulimanw,

Can I add the new A address early? I was confused earlier, it is actually the A record that I would like to change.
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