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We are planning a migration away from Google Apps for Business handling our email services. The services worked well to get us out of the gate, but now we need to consider scale, both volume and pricing, so we opted to maintain our own email servers.

My question is, is it possible to co-mingle their MX records with our own? My approach would be to add a new MX record for the domain with a priority of 1, and bump all the current Google MX records down in priority, consider the following:

# Current
1 ASPMX.L.GOOGLE.COM
5 ALT1.ASPMX.L.GOOGLE.COM
5 ALT2.ASPMX.L.GOOGLE.COM
10 ASPMX2.GOOGLEMAIL.COM    
10 ASPMX3.GOOGLEMAIL.COM

# Proposed
1 mail.example.com
5 ASPMX.L.GOOGLE.COM
10 ALT1.ASPMX.L.GOOGLE.COM
10 ALT2.ASPMX.L.GOOGLE.COM
20 ASPMX2.GOOGLEMAIL.COM    
20 ASPMX3.GOOGLEMAIL.COM

After we export / import current email accounts I will just remove all google references.

Is this parallel approach possible?

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  • Did you ever get this working? – Jacob Evans Oct 13 '15 at 18:32
  • Not yet, we are still in process of setting up the infrastructure in AWS, once we get everything ported over we will be focusing on email. I will post up when we get there. – Mike Purcell Oct 13 '15 at 18:40
  • Cool Deal, have you looked at Zimbra's open source system as well or sticky with the basics? – Jacob Evans Oct 13 '15 at 18:44
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    Excellent, don't forget opportunistic TLS on your smtp servers – Jacob Evans Oct 13 '15 at 19:12
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    Yes, have that as well, with a wildcard cert so we can add as many nodes as necessary. – Mike Purcell Oct 13 '15 at 19:15
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Yes it's possible, no not like that

MX Records are load balancing, the must all accept or deny equally.

What you want is called dual delivery which is specific to Google apps.

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    Thx this looks like the way to go. – Mike Purcell Dec 28 '15 at 19:22

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