Add your own Proton Mail domain

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Send and receive emails from your own domain with ProtonMail 

ProtonMail You can add your own domain with a paid plan, and you can send and receive emails for your own domain with the encrypted Proton Mail mail server.

MailPlus Only one unique domain can be added in the plan,Proton Unlimited Plans can be added up to 3 domains.
See below for how to set up and use Proton Mail
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Setting up and using Proton Mail for PC

End-to-End Encryptable Open Source Anonymous Email Proton Mail is a free and available anonymous email service provided by Swiss email / VPN provider Proton AG […].

Domain addition and validation

For your own domain, you need to configure the server after adding the domain with Proton Mail.

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Proton Mail Configuration Open and from the left sidebarDomain name Select "Add Domain".

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Enter the domain you want to add and click Next.

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Enter your ProtonMail login password to add your domain.

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You'll see the TXT record used to verify the domain owner., Proton Mail domain addition window without closingAccess the management screen of the server you are using.

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DNS settings in the server's domain settings DNS record settings から Add DNS record Select and hoStrike name-Type-Content (value) Enter to add a DNS record.

hostname : @
Type: TXT
Content (value): Copy and paste the value displayed in Proton Mail
If @ cannot be used in the host name / there is no entry for the host name, leave it blank.

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After adding the DNS record on the server 1-2 hoursAfter a while, "Next".

If you close the screen Configuration Of domain Since the domain added to is displayed, click "Review" and click "Next".

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After confirming the domain, set MX / SPF.

MX / SPF / DKIM / DMARC settings

Once the domain is confirmed MX (Mail eXchanger) Make the following settings.

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Once the domain is confirmed MX The set value of is displayed, so check it.

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DNS settings in the server's domain settings DNS record settings から Add DNS record Select and hoStrike name-Type-Content (value) Enter to add a DNS record. ..

hostname : @
Type: TXT
Content (value): Copy and paste the value displayed in Proton Mail
Priority: The value displayed in Proton Mail
MX Of hostname The @ Or Domain name Therefore, if the domain is forcibly attached to the host name, leave it blank.

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mail.protonmail.ch / mailsec.protonmail.ch Of MX record Add.

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Than the MX record you added to the list of DNS records Delete if a high priority (low value) MX record is registeredTo do.

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After adding the MX record, click "Next".

It takes several hours to a maximum of 24 hours for the MX settings to be reflected on the server.
SPF (Sender Policy Framework)

SPF The Spoofing Can be prevented Sender domain authentication.

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SPF Check the set value of.

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Add Proton Mail to the server's DNS record list if SPF is already registered.

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Edit the SPF TXT record andv = spf1 After the set value include: _spf.protonmail.ch mx ~ allAdd a half-width space.

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The registered SPF value comes after the ProtonMail value.

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If the existing SPF is not registered, then the DNS settings in the server's domain settings DNS record settings から Add DNS record Select andhostname-Type-Content (value) Enter to add a DNS record.

hostname : @
Type: TXT
Content (value): Copy and paste the value displayed in Proton Mail
If @ cannot be used in the host name / there is no entry for the host name, leave it blank.

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After adding the TXT record, click Next.

DKIM (Domain Keys Identified Mail)

DKIM Used a digital signature Sender domain authentication technology.

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DKIMCheck the set value of.

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DNS settings in the server's domain settings DNS record settings から Add DNS record Select and hoStrike name-Type-Content (value) Enter to add a DNS record.

Hostname: Hostname displayed in Proton Mail
Type: CNAME
Content (value): Copy and paste the value displayed in Proton Mail
If you get an error when adding a record,valueAt the end of proton.ch. Remove the period proton.ch Register at.

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Added 3 CNAME records.

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After adding the record, click "Next".

DMARC

DMARC Also Anti-spoofing Send domain authentication.

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DMARC Check the set value of.

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DNS settings in the server's domain settings DNS record settings から Add DNS record Select and hoStrike name-Type-Content (value) Enter to add a TXT record.

Hostname: Hostname displayed in Proton Mail
Type: TXT
Content (value): Copy the value displayed in Proton Mail, specify what to do with the email that failed authentication, and set the email address to receive the report.
DMARC Of value  The SPF-DKIM For emails that failed to authenticate with none ( do nothing )· quarantines (Isolated to junk mail folder) ・reject Specify (Rejection).
The set value is quarantinesIs recommended.

If you set the setting value to quarantine and receive the report at example@mail.com, the description is as follows.
v = DMARC1; p = quarantine; rua = example@mail.com

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Check that the added TXT record is correct.

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After adding the record, click "Next".

Add address

Add the email address used when sending.

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Click "Add Address".

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Configuration Of User information and address Click "Add Address" to move to.

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Enter the email address and display name to register,Key strength The Latest cryptographic format ECC Curve25519 Select (Elliptic Curve Cryptography) and click Save Email Address.

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Enter your ProtonMail login password and click "Send".

Verification

When all the settings are completed mail-tester.com Send the email address you added to to test if SPF / DKIM is set.

https: //www.mail-tester.com

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The test is performed after the setting of the original domain is reflected on the server and it becomes all green.

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mail-tester.com When you access, the email address is displayed, so click the copy icon to copy the address.

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Create a new email with Proton Mail, paste the copied email address, and send a blank email from the email address of your own domain you added.

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Click "Then check your score".

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Results are displayed on a scale of 10 points.

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You're properly authenticatedIf the item is displayed in green SPF/DKIM Is properly authenticated.

SpamAssasin thinks you can inprove-Your message could be improved Can be deducted for advice on test-sent messages.

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