This guide explains how to add or modify a DKIM record in a DNS zone (domain name) managed on the Manager Infomaniak.

Preamble

• The DKIM (Domain Keys Identified Mail) record type is a protocol that allows you to sign emails when sending them and ensures the optimal operation of your Infomaniak mail service.
• This ensures that the content of the emails is not modified during their transmission and that they indeed come from the domain of the sender. This standard thus prevents spammers from impersonating legitimate entities.
• DKIM will fail if it detects that a message has been modified and unauthorized changes have been made to theFromof the message.
• The DKIM standard is enabled for all Infomaniak customers with a Mail Service whose domain name has its DNS zone managed by Infomaniak. All emails sent from Mail or the email software/client of your choice are therefore automatically signed.
• DKIM is not available for subdomains.

Check the DKIM record

The Global Security tool allows you to easily check and correct certain problematic records.

And when your domain name is managed elsewhere, you will find the DKIM record to add in the DNS zone:

Manually modify the DNS zone (not recommended)

Refer to this other guide to manage this type of record in a DNS zone.

Add multiple DKIMs

You can have multiple DKIM records on your domain without limit, unlike DMARC or SPF, as long as your DNS host allows it.

If you use multiple third-party email providers, for example the ERP Odoo, it is necessary to add a DKIM for Odoo in addition to that of Infomaniak.

Use unique DKIM selectors to avoid conflicts with existing records.