Email Setup Wizard

Proton Mail + Squarespace Domains

Set up Proton Mail email on Squarespace Domains

The records Proton Mail needs, written with the field names Squarespace Domains uses (Name, Mail Server, Text, Data), in the order to add them.

  • 5 steps
  • 8 DNS records
  • Sources checked October 21, 2026

Before you start

  1. Have your Proton Mail account ready. Some values are unique to your account and come from the Proton Mail settings (Domain names).
  2. Open DNS at Squarespace Domains: Open the domains dashboard (account.squarespace.com/domains). Click your domain. Click DNS, then DNS Settings.
  3. Keep both tabs open and add the records below one at a time.

Records to add

Copy each value with the button next to it. Rows marked “Copy from Proton Mail settings (Domain names)” are unique to your account.

Domain verification Proves you own the domain Type TXT Name @ Value Copy from Proton Mail settings (Domain names) Looks like: protonmail-verification= followed by a code Priority n/a TTL 4 hours
MX records Where incoming email goes Type MX Name @ Value mail.protonmail.ch Priority 10 TTL 4 hours
MX records Where incoming email goes Type MX Name @ Value mailsec.protonmail.ch Priority 20 TTL 4 hours
SPF record Which servers may send as you Type TXT Name @ Value v=spf1 include:_spf.protonmail.ch ~all Priority n/a TTL 4 hours
DKIM A signature on every message Type CNAME Name protonmail._domainkey Value Copy from Proton Mail settings (Domain names) Priority n/a TTL 4 hours
DKIM A signature on every message Type CNAME Name protonmail2._domainkey Value Copy from Proton Mail settings (Domain names) Priority n/a TTL 4 hours
DKIM A signature on every message Type CNAME Name protonmail3._domainkey Value Copy from Proton Mail settings (Domain names) Priority n/a TTL 4 hours
DMARC record What to do with fakes · recommended Type TXT Name _dmarc Value v=DMARC1; p=quarantine Priority n/a TTL 4 hours

Step by step in Squarespace Domains

Verify your domain

Your email provider needs proof that you control this domain before it accepts email for it.

Type
TXT
Name
@
Text
Copy it from Proton Mail settings (Domain names) (see below)

Where to find your value

In Proton Mail open Settings → Domain names, add your domain and copy the verification value.

It looks like: protonmail-verification= followed by a code

In Squarespace Domains

  1. Scroll to Custom Records and click Add record.
  2. Re-enter your password (or confirm with two-factor authentication) if asked, then click Continue.
  3. Set Type to TXT, then fill in Name and Text.
  4. Click Save.

Point your MX records

MX records tell every other mail server where to deliver email for your domain. They must point to your provider and nowhere else.

Type
MX
Name
@
Priority
10
Mail Server
mail.protonmail.ch
  • Delete any other MX records, or make sure Proton's have the lowest priority number.
Type
MX
Name
@
Priority
20
Mail Server
mailsec.protonmail.ch

In Squarespace Domains

  1. Click Add record.
  2. Re-enter your password (or confirm with two-factor authentication) if asked, then click Continue.
  3. Set Type to MX, then fill in Name, Priority and Mail Server.
  4. Click Save. Add one record per mail server, each with its own priority.
  5. Repeat for each MX record above.

Add the SPF record

SPF is a TXT record that lists the services allowed to send email from your domain, so receivers can spot forgeries.

Type
TXT
Name
@
Text
v=spf1 include:_spf.protonmail.ch ~all
  • Keep one SPF record. To keep an existing one, add include:_spf.protonmail.ch right after v=spf1.

In Squarespace Domains

  1. Scroll to Custom Records and click Add record.
  2. Re-enter your password (or confirm with two-factor authentication) if asked, then click Continue.
  3. Set Type to TXT, then fill in Name and Text.
  4. Click Save.

Set up DKIM

DKIM publishes a public key so receivers can confirm your messages really came from you and were not changed on the way.

Type
CNAME
Name
protonmail._domainkey
Data
Copy it from Proton Mail settings (Domain names) (see below)

Where to find your value

Copy the exact target from the DKIM tab of your domain in Proton Mail settings.

  • Add all three DKIM records; Proton rotates keys between them.
  • Some hosts reject a trailing period on CNAME values. If yours does, remove the final dot.
Type
CNAME
Name
protonmail2._domainkey
Data
Copy it from Proton Mail settings (Domain names) (see below)

Where to find your value

Copy the exact target from the DKIM tab of your domain in Proton Mail settings.

Type
CNAME
Name
protonmail3._domainkey
Data
Copy it from Proton Mail settings (Domain names) (see below)

Where to find your value

Copy the exact target from the DKIM tab of your domain in Proton Mail settings.

In Squarespace Domains

  1. Scroll to Custom Records and click Add record.
  2. Re-enter your password (or confirm with two-factor authentication) if asked, then click Continue.
  3. Set Type to CNAME, then fill in Name and Data.
  4. Click Save.
  5. Repeat for each CNAME record above.

Add the DMARC record (recommended)

DMARC tells receivers what to do with mail that fails SPF and DKIM, and where to send reports about it.

Type
TXT
Name
_dmarc
Text
v=DMARC1; p=quarantine
  • Proton recommends a p=quarantine policy for most domains.

In Squarespace Domains

  1. Scroll to Custom Records and click Add record.
  2. Re-enter your password (or confirm with two-factor authentication) if asked, then click Continue.
  3. Set Type to TXT, then fill in Name and Text.
  4. Click Save.

Check your setup

Once the records are saved, run a live check. We look up your domain in public DNS and tell you what is right, missing or wrong, with the fix in Squarespace Domains’s words.

We only read public DNS records. Nothing is stored.

Common mistakes with Proton Mail on Squarespace Domains

Adding only one DKIM record

Proton uses three DKIM CNAMEs (protonmail, protonmail2, protonmail3). Add all three, matching the values in your setup wizard exactly.

Squarespace Domains: Change your Squarespace login first

If you sign in to Squarespace with an address at this domain, change your account email before deleting MX records, or you could lock yourself out.

Squarespace Domains: SPF entries are merged for you

Each SPF value added as its own custom record is merged into one SPF record. Refresh the page to see the merged result. If you get a Custom records not saved error, delete the existing SPF records and add them again.

Squarespace Domains: Only one DMARC record

A domain can have only one DMARC record. Email forwarding rules add one automatically, so merge into it rather than adding a second.

Visit Proton Mail Visit Squarespace Domains

Rather have someone do it for you?

Tell us your domain and we will add and verify every record for Proton Mail on Squarespace Domains, then send you the check results.

Request done-for-you setup

Proton Mail on Squarespace Domains: questions

Where do I add Proton Mail DNS records in Squarespace Domains?

Open the domains dashboard (account.squarespace.com/domains). Click your domain. Click DNS, then DNS Settings. Add each record there, one at a time.

What goes in the Name field at Squarespace Domains?

Enter @ for records on your bare domain, such as MX and SPF. For the others, enter only the part before your domain, for example protonmail._domainkey. Squarespace Domains adds your domain automatically.

Do I need to delete my existing MX records at Squarespace Domains?

Delete any other MX records, or make sure Proton's have the lowest priority number. If you sign in to Squarespace with an address at this domain, change your account email before deleting MX records, or you could lock yourself out.

Where do I get my Proton Mail DKIM record?

Copy the exact target from the DKIM tab of your domain in Proton Mail settings.

How long until Proton Mail email works on Squarespace Domains?

Squarespace says DNS changes can take 24 to 48 hours to update.

Sources

Every value and step on this page comes from these official pages. Dashboards change, so if something doesn’t match what you see, tell us.

Proton Mail on other hosts

Other email providers on Squarespace Domains