Apple Verification Emails Blocked
I have an urgent situation where emails from firstname.lastname@example.org are not being delivered to my Mailbox.org inbox.
When I try to add my Mailbox.org email account to my Apple account, a verification email is sent - however this is not appearing in my Mailbox.org inbox or junk folder.
I don't think Apple's servers are the problem because I have experimented adding other email addresses from other providers and the emails are delivered in a matter of seconds.
I have checked my spam folder and even turned off spam protection on my account in case it was being blocked by that.
I need urgent help with this please.