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?