If for sending e-mails, the MetaKocka e-mail server is used (which means that you are not using your server), then the reliability of the e-mail delivery can be increased by adding certain entries into the DNS server settings. More detailed instructions for both service providers can be found at the links below. Since DNS settings management could be technically demanding, we suggest contacting the company that manages your internet domain.
1. Instructions for configuration
2. Testing appropriate configuration
1. Visit https://www.mail-tester.com/spf-dkim-check
2. For "Domain name" enter the name of your Domain. For DKIM Selector enter "turbo-smtp".
3. "SPF check" must contain substrings "v=spf1 include:turbo-smtp.com ?all". Example:
4. "DKIM check" must contain something similar to what is displayed in the picture below:
