[exim] Retrive public DKIM key

Hello toall the Exim community,
my sharedweb hosting (GoDaddy) is using Exim 4.85 and, accordingly to this tool, unlocktheinbox.com/mail-tester/  I can see that my outgoing emails are DKIMsigned.
The problemis that they are not providing the corresponding public DKIM key to publish onmy dns.
There is away to retrieve the public DKIM key sending some kind of query to Exim server ?
Thank you.