After week of testing, loading data, design templates, ready to start, but after SPAM test received DKIM not valid...
Which wasn't the case 1 week ago...
After reading many message with similiar issues, did some checks. Generated new key as advised on the forum, needed GMail key, still searching for Apply Button as mentioned in manual :-) (Click on the button "Apply" to save the configuration.) I used the Save Button.
Changed DNS Recond at my hosting provider, waited, waited (Propagation) no success
Did some checks with https://mxtoolbox.com/dkim.aspx (selector ACY). Noticed that ACY DKIM was not found, even I had set my Record at my hosting company and noticed Cloudflare DNS server details.
Eureka! Need also to enter DNS record on my Cloudflare settings. Read more: https://dmarcly.com/blog/how-to-add-dkim-record-in-cloudflare-cloudflare-dkim-setup-guide (Point 4: Use the TXT option)
/Robert
PS I installed Cloudflare one day after testing Spam Report during setup ACYMailing
