ProtonMail

SPF Include Tag Required

This outbound email provider uses an include mechanism to add this provider's IP space to your SPF. To get fully set up with SPF for this provider, you will need to take the provided “include” domain and add it to your SPF record. An example of an SPF record without an include tag is compared to one with the tag added below (the include tags added are denoted in bold).

Initial SPF Record:

SPF record include added:

DKIM Setup via TXT record

This outbound email provider uses a TXT record to initiate DKIM set up. You will need to take the TXT record(s) provided to you by the provider and add them to your DNS via your DNS hosting provider.

An example of a DKIM TXT record is shown below.

This outbound email provider allows custom DKIM records to be setup.