About SPF and DKIM
If you're sending emails and have changed the from email, you need to add SPF and DKIM records and verify ownership of your sending domains.
Failing to do this will result in the emails going into the spam folder or being rejected completely.
This is done within your domain registrar, and not in CT.
We use Mandrill to send mail, so the instructions are the same as theirs. Replace *yourdomain.com* with your domain.
Set Up SPF and DKIM for Your Sending Domains
Now that you've added a new sending domain, you can also add the appropriate records to your domain's DNS settings. To add the SPF and DKIM records for your sending domains, you'll need to add records of type 'TXT' through your hosting provider, domain registrar, or DNS provider. We recommend referring to your provider's help documentation for specific information on adding TXT records.
If you don't have an SPF record yet, you'll need to add one for your domain. At a minimum, the value should be the following if you're only sending mail through Mandrill for that domain:
<code>v=spf1 include:spf.mandrillapp.com ?all
If you already have a TXT record with SPF information, you'll need to add Mandrill's servers to that record by adding
include:spf.mandrillapp.com in the record (before the last operator, which is usually
Add a new TXT record with the name
mandrill._domainkey.yourdomain.com (just replace yourdomain.com with the domain you're setting up).
The value for the record should be one of the options listed below. There are two options because the record contains semicolons. Some DNS providers escape semicolons for you while others require you to do it when you set up the record.
With semicolons escaped:
<code>v=DKIM1\; k=rsa\; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrLHiExVd55zd/IQ/J/mRwSRMAocV/hMB3jXwaHH36d9NaVynQFYV8NaWi69c1veUtRzGt7yAioXqLj7Z4TeEUoOLgrKsn8YnckGs9i3B3tVFB+Ch/4mPhXWiNfNdynHWBcPcbJ8kjEQ2U8y78dHZj1YeRXXVvWob2OaKynO8/lQIDAQAB\;
With semicolons unescaped:
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCrLHiExVd55zd/IQ/J/mRwSRMAocV/hMB3jXwaHH36d9NaVynQFYV8NaWi69c1veUtRzGt7yAioXqLj7Z4TeEUoOLgrKsn8YnckGs9i3B3tVFB+Ch/4mPhXWiNfNdynHWBcPcbJ8kjEQ2U8y78dHZj1YeRXXVvWob2OaKynO8/lQIDAQAB;
You can read more about SPF here.