frank.michael FR

Using my squarespace domain for a substack newsletter

Main site is on squarespace and I'd like the newsletter on a subdomain of the same domain. Substack's instructions mention a CNAME but the squarespace DNS panel has me confused. Has anyone set this up without breaking the main site?
connect custom domain
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yvibe_growth Nov 12, 2026
frank.michael
Good news on the switch: the old substack address keeps redirecting to the new domain, so links you've already shared don't break. I'd still update your bio links once it's live.
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A
alwnw Oct 16, 2026
frank.michael
Is the Squarespace site still running on the main domain? If yes, don't point the root domain at Substack or your website goes down. Use a subdomain like newsletter.yourdomain.com instead. Substack's custom domain option is a paid add-on (one-off fee). Once you've paid, it shows you the DNS record to add, then you add that under the domain's DNS settings in Squarespace. It usually takes a few hours to start working, sometimes longer.
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