This image shows several maps and illustrates an article discussing the regions in AWS SES.

- 3 min read

Maximizing Your Use of AWS SES Regions: Understanding Availability, Benefits, and More

Explore the intricacies of AWS SES Regions, learn about their availability, comprehend the impact of choosing the right region, and leverage these insights for your email campaigns.

When operating in the global sphere of Amazon Simple Email Service (SES), understanding regional distribution and functionality can give you a significant advantage. Grasping the nuances of AWS SES regions and their availability across multiple availability zones has a significant impact on your email campaign performance, deliverability and general email operations. This knowledge, coupled with Semplates' email template services, can help you unlock the full potential of your email campaigns.

The In-depth Guide to AWS SES Regions and Endpoints

AWS SES is globally available across several regions, with each region boasting multiple Availability Zones. These zones are physically separate yet interconnected through a private, high-throughput, low-latency, and robustly redundant network. This unique setup provides a high level of availability and redundancy, and it significantly reduces latency. When it comes to sending and receiving emails, AWS SES utilizes unique URLs that serve as endpoints for the SES API or the SMTP interface. You can make HTTPS requests to the SES API using the URLs mentioned in the HTTPS row in the Protocol column, and similarly, for sending emails, you can use the SMTP interface via URLs specified in the SMTP row. For users who have configured Amazon SES to receive emails sent to their domain, inbound SMTP endpoint URLs (beginning with "inbound-smtp.") are provided for establishing the mail exchanger (MX) records in the DNS settings for your domain.

Region-Specific Differences in Sandbox Removal and Sending Limit Increases

Interestingly, the sandbox status for your AWS account can differ across AWS regions. For example, if your account has been removed from the sandbox in the US West (Oregon) region, it might still be in the sandbox in the US East (N. Virginia) region, unless you've requested removal in that specific region as well. Similarly, sending limits can also vary depending on the AWS region. If your account is able to send 10 messages per second in the Europe (Ireland) region, the sending capacity might be different in other regions. When you submit a request to have your account's sending quotas increased, or to remove your account from the sandbox, make sure to select all the relevant AWS regions to which your request applies. These region-specific considerations are critical for optimizing your email sending strategy and ensuring efficient resource utilization.

A Look at How Verification of Email Addresses and Domains Operates across Regions

Before initiating email sending using Amazon SES, the service necessitates that you verify your ownership of the email address or domain you plan to send from. The verification status of email addresses and domains, however, varies across AWS regions. If you verify a domain in the US West (Oregon) region, you cannot use that domain to send email in the US East (N. Virginia) region until you repeat the verification process for that specific region. This unique aspect of AWS SES regions necessitates careful planning, especially for users intending to use AWS SES services across multiple regions.

Key Insights into Email Receiving, Custom MAIL FROM Domains, and Additional Aspects

The Amazon SES's email receiving feature is not uniformly supported across all regions. For instance, some regions, including several Asia Pacific and European regions, currently do not support email receiving, making it crucial for users to check their region's capabilities before initiating email operations. Furthermore, Custom MAIL FROM domains can be employed across different regions, and bounce notifications are redirected following certain rules. You should also be aware of sending authorization, Easy DKIM setup, and account-level suppression lists that operate differently across regions. These functionalities add another layer of complexity to AWS SES regions and are important aspects to consider while setting up your email infrastructure. For more information, check out AWS' Developer Guide on this topic.


Delving into the details of AWS SES regions is instrumental for effectively optimizing your email operations. By considering regional variations in sandbox status, sending limits, domain verification, email receiving capabilities, you can significantly improve your email deliverability and operational efficiency. This ultimately contributes to the effectiveness of your communication strategy and facilitates successful email campaigns.

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