The following must be included in your SPF record when sending email from LiquidSix servers:

include:yourwebservers.com

This is automatically set by default on all domains that have their DNS hosted with us using the following record:

v=spf1 include:yourwebservers.com ?all

The default record can only indicate a neutral response for other servers, as we can not know what other servers customers are using. If you are definitely only sending emails from our servers, and no others, you can improve your SPF record by changing it to the following:

v=spf1 include:yourwebservers.com -all

If you are sending email from other servers, or have your domain's DNS hosted elsewhere, please contact your other provider(s) for assistance in setting appropriate SPF records.