Since Saturday, March 1, we have seen a delayed delivery of emails to icloud.com and me.com addresses. The delay in the delivery of the emails can be up to several hours.
Update 03/03/2025: We have contacted Apple, the operator of icloud.com and me.com, but without result so far.
Update 06/03/2025: We have received a response from Apple, in which they indicate that delivery should now run more smoothly. We do indeed see that more emails are being delivered for icloud.com and me.com mailboxes and that the number of emails in the queue is decreasing.
We will follow this up further.