I am using Klaviyo to store profiles of users signing up with my app. Many users use Sign In with Apple. Most of these users use private relay. These emails looks like [random id]@@privaterelay.appleid.com
All my emails to these profiles are hard bouncing and the profiles are being suppressed. I use protonmail for setting up emails with custom domains. Maybe thats part of the problem? The emails are also bouncing when I’ve tried sending emails to these emails manually through there.
Is there any way to improve deliverability to these emails? I saw this thread on reddit and it seemed like it was possible, but there wasn’t a final solution proposed.
https://www.reddit.com/r/Klaviyo/comments/11eq6e3/emails_to_icloud_accounts_icloud_mac_me_bouncing/