What is DKIM?

Read the article here.

How to set the DKIM?

Settings on your server:

To properly configure DKIM for your domain, you must add the following DNS record:

Some providers require that addresses like “emaillabs._domainkey.domain.com.” and “emaillabs._domainkey.emaillabs.co.” are written without a dot at the end.

where domain.com is the name of your domain.

Settings of the EmailLabs panel:

In the “Enter the custom domain”, enter the domain from which emails will be sent.

However, when the dispatch is directed by a larger number of addresses, select “Download dynamically from the field FROM”, then your domain name will be downloaded automatically from the sender of the e-mail.

To increase the efficiency of the authorization by external servers, it is recommended to add the domain yourself in the “Enter a custom domain”.