Correct SPF for dreamhost discussion list

What is the correct SPF TXT DNS record for a dreamhost-hosted discussion list sub-domain?

Suppose my domain is the IP address of is

Do I just add a DNS TXT record of v=spf1 ip4: ~all to


I recently setup my first dreamhost/mailman discussion list on a domain for a small community group. Many of my users aren’t receiving email sent through the list and they’re not appearing in spam folders either. The users who aren’t receiving the emails all use BT (British Telecom) as their ISP and have email addresses like

Searching through BT’s website suggests they require SPF records to be set for the mail sender’s domain:


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