I had just recently signed up for e-mail hosting, and I have the MX records and SPF records all in, so I can send e-mail, but I can’t figure out where to put in the DKIM records, so when I try to send a test e-mail to it, it has an error because I couldn’t add the DKIM record. How do I add it so I don’t get this error?
To add DKIM to your domain, you need to be able to configure TXT records. And setting TXT records is not supported on InfinityFree. Full DNS management is only available on premium hosting.