Here are the steps to check if your mail server is using DKIM:
1. Use a DKIM checker tool: There are various online tools available that can check whether your mail server is using DKIM or not. Some popular tools are DKIM Validator, MX Toolbox, and DMARC Analyzer.
1. Check DNS records: DKIM records are stored in the DNS records of your domain. You can use a DNS lookup tool to check whether the DKIM record is present or not. To do this, check for a TXT record under the domain name “\_domainkey.”
1. Check email headers: Another way to check if your mail server is using DKIM is to inspect the email headers. Look for a “DKIM-Signature” field in the header section of the email. If this field is present, then your mail server is using DKIM.
1. Contact your hosting provider: If none of the above methods work, then contact your hosting provider or IT support team to confirm whether DKIM is enabled or not.
