Modified SPF record: v=spf1 mx include: include:_ -all Previous SPF record: v=spf1 mx include: -all

If you do have an existing SPF record in your DNS, you need to modify it to include ProtonMail, as shown below: Note : If you don’t have an SPF record previously for your domain, simply publish the above-mentioned record to enable SPF for outgoing emails using ProtonMail. Publish this record in your DNS records section for your respective domain. You need to edit the DNS TXT record related to SPFĪn SPF TXT record for ProtonMail will have the following syntax: Navigate to Tools & Settings > DNS Template Or, you can also publish your record for ProtonMail without having to log into your ProtonMail account. Here you will find your SPF record for ProtonMail. In order to generate your SPF record on ProtonMail, log in to your ProtonMail account and navigate to Settings → Organization → Custom domains → Actions → Review button → SPF. How to Create an SPF Record for ProtonMail? ProtonMail highly recommends that you configure SPF for all your registered domains to make sure your outbound emails are effectively authenticated. The technique works by sending servers checks with SPF data, which compares sending IP addresses to the ones registered by the sender's domain.

SPF is the most effective way to prevent spammers from using your domain name.

It's an email authentication standard that allows a domain to publish a public list of which mail servers are permitted to send emails on its behalf.

Protonmail use own domain