I have a problem with the email sent from my server (with Postfix + opendkim) and I receive the error “Your DKIM signature is not valid”.
I tested the configuration with a lot of tool, I switched to a 2048 key, I changed the key from the default but the problem still exist.
My DNS entry is nuvolo._domainkey.ebookecm.it
Cloudflare does not perform any DKIM signing. If your DKIM record is published correctly in your Cloudflare DNS, there isn’t anything else that can be accomplished in the Cloudflare forums.
I recommend the dmarcian forums for assistance on DMARC, DKIM and SPF. I am active there as well as here which means I can guarantee a response if you post there.
I found the solution. It was a totally different point of failure. The issue was generated by PHPMailer without the isSMTP=true parameter.
Thank you for the help
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