Changing ipaddress for mail server

I will be using another ipaddress soon for receiving email on my mailserver. The problem however is that I don't want to be out of mail so I understand that I can use two mxrecords so when one fails it will always be caught by the second one.

How can I set this up?

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LufaaAsked:
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Brian PiercePhotographerCommented:
If its just the internal address thats chnaging then you need do nothing. If on the otherhand the ISP is changing your public IP address then you will have to get them to configure the MX record on their internet DNS
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LufaaAuthor Commented:
It's the external that is changing because I'm adding another dsl connection for failover purposes. But this new line will be my primary connection but if this one fails I would also like to have the possiblity that the old cable connection will still be able to receive email. So dsl has prio 10 and cable will have prio20 right?
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Brian PiercePhotographerCommented:
OK - You need to speak to your ISP
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AkhaterCommented:
1) You need to check your current MX record assuming it is configured as follows
   domain.com MX record pointing to smtp.domain.com with a priority of 10
   and A record pointing smtp.domain.com to the current IP address

2) You need to add another A record smtp1.domain.com pointing to the new IP address and add another MX record priority 5 pointing to smtp1.domain.com


the idea is that the one you want to be the "primary" mx record should have a lower priority number
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malcouCommented:
You can use www.mxtoolbox.com to check the status of your mx record
When you are finished you shoud see two lines with different priorites and your two IP addresses

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LufaaAuthor Commented:
I now have a second internet connection setup. Let's say I ave internet A en internet B.
Is it possible to receive email via excahnge on internet A where my ipaddress is linked to my domain and have the mail being send out over internet B?
Problem is that the smtp for internet A has been RBL listed with my ipaddress of internet A and somehow they are not removing me from the list.
 
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AkhaterCommented:
yes it is possible they are not mutually exclusive

to receive emails your MX record should point to the IP of internet A

to be able to send emails you need have a valid PTR record on the ip of internet B
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LufaaAuthor Commented:
PTR record?
How do you set that up?
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AkhaterCommented:
your PTR record is set at your ISP. you ask your ISP to create it for you
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LufaaAuthor Commented:
Thnx guys for all comment!
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