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I have both a MailChimp and Mandrill account and for obvious reasons, I'm migrating from Mandrill to Mailgun, but keeping MailChimp for now.

MailChimp requires the following DKIM record (CNAME):

k1._domainkey.example.com -> dkim.mcsv.net

Mailgun requires the following DKIM record (TXT):

k1._domainkey.example.com -> k=rsa; p=REDACTED

But these DNS records can't coexist because they have the same host name. How can I continue to use both MailChimp (for marketing) and start using Mailgun (for transactional email) on the same domain?

Steve
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  • Unfortunately it wouldn't be ideal for me to take down my Mailgun domain and recreate it, since it's actively used for sending/receiving email. I added a bounty and I'm looking for a solution that doesn't involve recreating the domain in Mailgun. – Maximillian Laumeister May 14 '16 at 17:19

2 Answers2

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Now is possible to change the DKIM Selector from the Domain Settings

enter image description here

Renzo
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  • how? There is no "edit" button on your screenshot (in my Domain Setting neither) – H1D Aug 04 '17 at 00:22
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    wow! "edit" button became available after failed DNS records cheking – H1D Aug 04 '17 at 00:40
  • Hi there! Could you please clarify this post? Is this setting still available in MailChimp? – Daniel Hollas May 17 '18 at 22:45
  • This setting is in Mailgun not Mailchimp, I dont know if Mailchimp allows this change, though all you need is one to be different – Renzo May 18 '18 at 07:16
  • this really helped me in Mailgun! To add to @H1D's response, I had to change the DKIM to fail verification, which allowed me to change the DKIM Selector – Jan Oct 01 '18 at 13:54
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The clashing subdomains was a coincidence. I deleted and recreated the domain in Mailgun and it gave me a totally different TXT record host - mailo instead of k1. No wonder Google wasn't my friend.

Steve
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    Experiencing this problem as well. Beware though, deleting the domain in Mailgun will change api keys, passwords, etc. We wished we could use this solution. – John Apr 15 '16 at 17:46