If you point your DNS to our name servers, that is done automatically for you, if you aren't sure, can submit a ticket for support to troubleshoot the issue from within your admin area. However, if you point an "A-Record" (if you point your domain name to an IP address--rather than your full domain name), then you will need to configure a few extra steps. Please look at the LAST 2 lines where mandrill is mentioned and update your domain name with the following. You will be adding these to your Zone file for the domain that is in the From email. 

  1. To enable DKIM, create a TXT record for (  mandrill._domainkey.YOURDOMAIN.COM  ) with the following value: 
  3. To enable SPF, create a TXT record for YOURDOMAIN.COM with the following value: v=spf1 include:spf.mandrillapp.com ~all
  4. If more than one SPF record add this ( include:spf.mandrillapp.com  ) must end with the ~all : Example of combined SPF record is > 
    v=spf1 include:spf.protection.outlook.com include:spf.mandrillapp.com -allPF record, Example below: I
  5. Apply your changes and depending on your domain settings, it may take up to 24 hrs for this change to take effect.

$TTL    300
mydomain.com. IN        SOA    ns332.corecommerce.com. webmaster.corecommerce.com (
                2010012501     ; Serial
                86400          ; Refresh 3 hours
                7200           ; Retry 1 hour
                604800         ; Expire 1 week
                300            ); Negative TTL: Minimum 5 minutes
www    IN      A     
mydomain.com.    IN      NS              ns332.corecommerce.com.
mydomain.com.    IN      NS              ns342.corecommerce.com.
mydomain.com.    IN      A     
mydomain.com.    IN      TXT             "v=spf1 include:spf.mandrillapp.com -all"
mandrill._domainkey    IN      TXT             "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrLHiExVd55zd/IQ/J/mRwSRMAocV