Before you start using our service in production, you need to complete the following. Don't worry if it looks complicated - we can help! Email us at support@sailthru.com.
Your system administrator, or whoever has set up your domain name, can help with this if you're not technologically inclined.
If you don't have an SPF record already, just add a new TXT record; a sample one that only permits Sailthru could look like this:
; spf record for example.com example.com. IN TXT "v=spf1 include:aspmx.sailthru.com -all"
And here's a sample sender record. Again, both are required for optimal delivery.
; sender id record for example.com example.com. IN TXT "spf2.0/pra include:aspmx.sailthru.com -all"
CNAME for a link subdomain that resolves to cb.sailthru.com. This record is used for link rewriting on your emails. It improves deliverability and the user experience as your links will appear to be coming from your domain. Here is a sample CNAME:; cname record for example.com link.example.com. CNAME cb.sailthru.com.
The link subdomain can be anything that you're not currently using; we recommend keeping it short, such as link.yourdomain.com.
CNAME for a Horizon subdomain that resolves to horizon.sailthru.com. This record is used for tracking interests. Here is a sample CNAME:; cname record for example.com horizon.example.com. CNAME horizon.sailthru.com.