I need to create an RBL exception for hubspot, but they suggest using a DNS which resolves to a TXT record. Can I whitelist based on a TXT DNS?

What do you mean by an RBL exception, Jason - do you mean that Hubspot will be sending marketing emails for you using your domain name?  If you have an SPF record in DNS, just add include:shared.hubspot.com to it.

Cheers - Bob

No.   Incoming email.  They seem to be on RBL often and I need to create an RBL exception so their emails to our marketing people don't get randomly dropped.    They suggested I exclude their source server IPs from RBL checks, which is like 100 different IPs in that SPF record (shared.hubspot.com).   I guess I could manually put every IP into the UTM, but this wouldn't be dynamic as they may change their IP ranges.  

If these are all emails from their domain, just make an RBL Exception for *@hubspot.com - any luck with that?

Cheers - Bob

If these are all emails from their domain, just make an RBL Exception for *@hubspot.com - any luck with that?

Cheers - Bob