Alias iCloud emails not being received by recipients.
I have added two aliases to my iCloud email account. I sent several test emails to my Gmail account. When I sent a test message from my alias email address, the email was not received. When I sent a test email from my default iCloud email address, it was received. How can I send an email from my iCloud email, using my alias, and have it received the same as it is using my default iCloud email address?
MacBook Pro (M2 Pro, 2023)