Mail._domainkey messes up my DNS

So I got an error from Gmail, saying the message was spam because the DKIM, I am not using MIAB for hosting that sites DNS. I just set MX records on my host for them. I cant do long strings

How do I do this?

You may encounter zone file errors when attempting to create a TXT record with a long string. RFC 4408 states a TXT record is allowed to contain multiple strings, and this technique can be used to construct records that would exceed the 255-byte maximum length. You may need to adopt this technique when adding DomainKeys. Use a tool like named-checkzone to validate your zone file.

Update:

I fixed it, did this:

“v=DKIM1; k=rsa; s=email;” “p=MIIBIjANBgkqhkiGlkhjsds99sd9slaa0IIBCgKCAQEA4moEUkhclbFjSXuz0uJq9u1Gp4advKk” “AIu2gqhb+AXc+E89309dsijpavpfui9MZ14ydRa3BmLfAFrVtCPVgRjb” “NbYIuAvplUVoPAq7kijfdifosis0dKxXPAuL3vi+mtOHHFwYKlG7xiAKqf5l3+cr3XQ72bdwf” “WE9Mer3dx6dES99oaC4umFtatRw5dgQ98898s9ds9adQWyb82nrP7qwxHQyd3jo3OIFK66CsDnOMRRiGXQSArP14vbaqm” “s/2fsNphjL9D+3jkbfdsalkjsndasla3ooAIyqbQIDAQAB”