Hello, I have created new e-mail domain in ISPConfig (3.2.11) and since I've already had DKIM for it set up, I've chosen to paste the key into the form, instead of generating new one. The public and private keys were correctly created, but the bogus DNS appeared in DNS (the correct key was already there): mail._domainkey.example.com. 86400 TXT "v=DKIM1; t=s; p=" I guess the recommended way is to generate the DKIM key, but if the interface allows importing of private key, empty public key should not be added.
What I wanted to say is, particular TXT record is there and was there already. Sending mail did produce signed and correctly validated e-mail. But I've had to remove empty empty/bogus DKIM TXT record added by ISPConfig two times.
Open an issue in the issue tracker for it so we can investigate why it gets added with a manually created key. https://git.ispconfig.org/ispconfig/ispconfig3/-/issues