Subject: Delivery Status Notification (Delay)

From: Mail Delivery Subsystem <[email-masked]>
Date: Thu, 22 Jan 2026 15:34:07 -0800 (PST)

** Delivery incomplete **

There was a temporary problem delivering your message to [email-masked]. Gmail will retry for 23 more hours. You'll be notified if the delivery fails permanently.

Learn more here: https://support.google.com/mail/?p=ReceivingRate

The response from the remote server was:
450 4.2.1 The user you are trying to contact is receiving mail at a rate that prevents additional messages from being delivered. Please resend your message at a later time. If the user is able to receive mail at that time, your message will be delivered. For more information, go to https://support.google.com/mail/?p=ReceivingRate a640c23a62f3a-b885b36d7c5si57039966b.43 - gsmtp