What is Sending limits in AWS? Detailed Explanation

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Sending limits refer to the restrictions imposed by AWS on the volume of outbound emails that can be sent from their cloud infrastructure. These limits are in place to prevent abuse and ensure the smooth operation of their email services. When it comes to AWS, there are certain sending limits that users need to be aware of.

Firstly, there are limits on the number of emails you can send per second (EPS) and per day. The exact values of these limits vary depending on the AWS region you are operating in. For example, in the US East region, the limit is set at 50,000 EPS and 100,000 emails per day for new accounts. However, these limits can be increased by requesting a limit increase through the AWS Support Center.

Additionally, AWS has limitations on the maximum size of emails that can be sent. In general, the maximum size limit is set at 10 megabytes (MB) for both the email and its attachments. It's important to keep in mind that this limit includes the email headers, body, and any attachments combined.

Furthermore, AWS also sets limits on the rate at which you can send emails to specific domains. For instance, there might be a limit on the number of messages you can send to a specific domain within a certain timeframe. This helps prevent email providers from flagging your emails as spam due to an excessive volume of messages.

To ensure you stay within the AWS sending limits, it's crucial to monitor your email usage closely. By keeping track of your email sending patterns, you can estimate the potential impact on your reach and avoid hitting these limits. Additionally, you should consider employing email throttling techniques, which involve pacing the rate at which emails are sent to avoid sudden surges that may trigger these limits.

Understanding the sending limits in terms of AWS is vital for anyone using their cloud infrastructure for email services. By adhering to these limits and implementing best practices, you can maintain a reliable and smooth email delivery system while leveraging the benefits of AWS's cloud services.

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