Title: Unsure if this is the same for everyone but our notification emails from SES are being rate limited by Gmail.<p>Background:<p>One of my apps provides time-sensitive email notifications, for 60-90 days, to the subscribers(paid) - so it is critical to deliver emails. We have been using the same email provider and have been using AWS SES for a couple of years now. We have the SPF, and DKIM all verified. Yet, for the last 3 days, we are getting the below email<p>```<p>Sub: Delivery Status Notification (Failure)<p>Body: Our system has detected an unusual rate of&lt;CRLF&gt;421-4.7.28 unsolicited mail originating from your IP address. To protect our&lt;CRLF&gt;421-4.7.28 users from spam, mail sent from your IP address has been temporarily&lt;CRLF&gt;421-4.7.28 rate limited. Please visit&lt;CRLF&gt;421-4.7.28 https:&#x2F;&#x2F;support.google.com&#x2F;mail&#x2F;?p=UnsolicitedRateLimitError to&lt;CRLF&gt;421 4.7.28 review our Bulk Email Senders Guidelines.&gt;<p>```<p>Troubleshooting till now: I have got the AWS tech support team confirming my email configuration has no issues. AWS team has informed &quot;The current throttling is just that Gmail is seeing a lot of messages from the SES shared IP and is throttling the messages&quot;<p>&gt;&gt;&gt; <i>Is anyone facing the same issue with AWS? or similar issues with other bulk email service providers?</i><p>&gt;&gt;&gt; <i>How do you deal with such issues in the future? Set up alternative email service providers.</i><p>&gt;&gt;&gt; <i>Is this the side effect of Gmail&#x27;s dormant account deletion rolled out last week?</i>
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