Amazon WorkMail quotas

Amazon WorkMail can be used by enterprise customers as well as small business owners. Although we support most use cases without the need to configure any changes in quotas, we also protect our users and the internet against abuse of the product. Therefore, some customers may run into quotas that we have set. This section describes these quotas and how to change them.

Some quota values can be changed, and some are hard quotas that cannot be changed. For more information about requesting a quota increase, see AWS Service quotas in the Amazon Web Services General Reference.

Amazon WorkMail organization and user quotas

You can add up to 25 users to your Amazon WorkMail organization for a 30-day free trial. After this period ends, you are charged for all active users unless you remove them or close your Amazon WorkMail account.

All messages that are sent to another user are considered when evaluating these quotas. These include emails, meeting requests, meeting responses, task requests, and messages that are forwarded or redirected automatically as the result of a rule.

Note

When requesting a quota increase for only a specific organization, include the organization name in your request.

Resource	Default quota	Upper bound for change requests
Amazon WorkMail organizations per AWS account	100	Can be increased depending on the directory type that is used for the organization. You can view AWS Directory Service quotas and request increases from the AWS Directory Service console. For more information, see Service quotas in the AWS General Reference.
Users per Amazon WorkMail organization	1,000	Can be increased depending on the directory type that is used for the organization: Amazon WorkMail directory: up to 10 million users Simple AD or AD Connector, large: up to 5,000 users* Simple AD or AD Connector, small: up to 500 users* Microsoft AD, hosted by AWS Directory Service: depending on your set-up and configuration, up to 10 million users *If you are using Simple AD or AD Connector, see AWS Directory Service for additional information.
Free trial users	Up to 25 users in the first 30 days	The free trial period is only applicable for the first 25 users in any organization. Any additional users are not included in the free trial offer.
Recipients addressed per AWS account per day	100,000 recipients external to the organization, with no hard quota on recipients internal to the organization	There is no upper bound. However, Amazon WorkMail is a business email service and not intended to be used for bulk email services. For bulk email services, see Amazon SES or Amazon Pinpoint.
Recipients addressed per AWS account per day using any of the test domains	200 recipients, regardless of destination	The test mail domain is not intended for long-term usage. We recommend that you add your own domain and use it as the default domain.

Quotas for groups are set by the underlying directory.

WorkMail organization setting quotas

Resource	Default quota
Number of domains per Amazon WorkMail organization	1,000 This is a hard quota and cannot be changed.
Number of sender patterns in email flow rules per rule	250 This is a hard quota and cannot be changed.
Number of sender patterns in email flow rules per organization	1,000 This is a hard quota and cannot be changed.

Per-user quotas

All messages that are sent to another user are considered when evaluating these quotas. These include emails, meeting requests, meeting responses, task requests, and messages that are forwarded or redirected automatically as the result of a rule.

Resource	Default quota	Upper quota for change requests
Maximum size of mailbox	50 GB This is a hard quota and cannot be changed.	Not applicable
Maximum number of aliases per user	100 This is a hard quota and cannot be changed.	Not applicable
Recipients addressed per user per day using the domain that you own	10,000 recipients external to the organization, with no hard quota on recipients internal to the organization.	There is no upper bound. However, Amazon WorkMail is a business email service and not intended to be used for bulk email services. For bulk email services, see Amazon SES or Amazon Pinpoint.

Message quotas

All messages that are sent to another user are considered when evaluating these quotas. These include emails, meeting requests, meeting responses, task requests, and messages that are forwarded or redirected automatically as the result of a rule.

Resource	Default quota
Maximum size of incoming message	25 MB This is a hard quota and cannot be changed.
Maximum size of outgoing message	25 MB This is a hard quota and cannot be changed.
Number of recipients per message	500 This is a hard quota and cannot be changed.