I copy a text file (without BOM) from Notepad++ to the clipboard in the TXT field for DKIM. After saving some strange quotes and a space appear. And of course this entry becomes invalid. What’s the problem?
This isn’t a problem; it’s part of how TXT records are stored in the DNS. Some providers hide the quotes, but TXT records consist of strings of up to 255 bytes each. Anything longer than that needs to be split up.
Ok, but validaror said “The public key contains invalid characters. DKIM record should not contain whitespace characters”.
And brevo.com displays my DKIM signature as “default” (not valid).
What should I do?..