DKIM verification faIling for a custom Icloud+ domains.

Hi everyone. Finally today, Apple published the DKIM public key for my domain on their servers and DKIM validation is working properly on my new domain.

So, problem solved!

I have the same issue, worked fine for 2 years. DKIM records are fine and checked, now mail signature verification fails. I've reported to icloudadmin@apple.com as instucted in Postmaster information for iCloud Mail – Apple Support (UK)

I have the same problem if I try to verify my icloud DKIM using dig or nslookup.

My DKIM record looks OK if I using these DKIM verification tools:

• https://dmarcly.com/tools/dkim-record-checker
• https://mxtoolbox.com/dkim.aspx

Having said that, DKIM does not work with my icloud account unless I set my "From" address to my icloud.com address. That is, DKIM does not work for custom domains.

I have the same problem with a domain that was registered at iCloud Custom Domains less than 15 days ago. The older 2 domains I have work fine with DKIM validation and DKIM keys published correctly; on the new domain, the public DKIM key is not published on Apple servers and consequently DKIM validation fails.

I have opened a support ticket with Apple Support without much success at the moment (they are driving me crazy looking at stuff on my iPhone when the problem is clearly the publishing of the DKIM public key on Apple's servers). I also sent an email to icloudadmin@apple.com as discussed here.

I hope they fix it soon!

My domain's DKIM TXT at sig1.dkim.<customdomain>.at.icloudmailadmin.com. is populated correctly but DKIM signature of outgoing messages fails to verify at recipient's server.

Fixed for me also, finally