Solution:

• Check forwarder settings: Go to Email → Forwarders and verify that your email forwarding settings are correct.
• Check email quotas: Ensure the email account you're forwarding from is within its storage limits.
• Check spam filters: Emails may be marked as spam in the destination account. Review the spam filter settings in both source and destination email accounts.
• Verify MX records: Check if your domain’s MX records are correctly configured in the Zone Editor to ensure proper email routing.