Yes we publish SPF records for all domains hosted by us that use our DNS servers.
The default SPF record is:
v=spf1 ip4:66.235.184.97 ip4:66.36.228.239 ip4:66.36.228.240 ip4:209.160.66.186 ?all"
If you send your email through the our mail servers then we will respond with PASS to any SPF check performed.
If you send your email by a different mail server but use a domain hosted by us then the response would be NEUTRAL.
You can override our default spf record by setting your own up using the dns zone editor in helm.