Add Your Reply Domain Records in Squarespace

Squarespace calls this section Custom Records, and it is where every record you add by hand lives. Domains that used to be on Google Domains are here now, under the same Squarespace domains dashboard.

Copy the real values from the domain screen in Know Reply before you start. Three of the four are unique to your domain.

Add the records

1. Open your domains dashboard, click the domain, then click DNS, then DNS Settings.
2. Scroll to Custom Records and click Add record. Select MX in the Type menu, enter reply in Name, mx.sendgrid.net in Data, and 10 for priority.
3. Click Add record again. Select CNAME, enter the host with your domain removed, for example em1234.reply, in Name, and paste the SendGrid target in Data.
4. Repeat step 3 for s1._domainkey.reply and s2._domainkey.reply.
5. Save.

Squarespace appends your domain to whatever you type in Name, so use the short form. A CNAME cannot use @ in the Name field, which is not a problem here because none of these records sit on the root.

Lower the TTL before you start

Custom records get a 4 hour TTL by default. That is fine once everything works, and painful while you are still correcting a typo, because a wrong value stays cached for four hours. Set the TTL to a few minutes on each record while you set it up, verify the domain in Know Reply, then raise it if you want.

Then check it

Go back to the domain screen in Know Reply and click Check DNS. If a record is still failing, check the TTL note above before you assume the value is wrong.

Full record reference and what each one does: How a reply domain works.