One Organization in Workmail not able to send or receive

I'm sorry to hear you're experiencing issues with one of your WorkMail organizations, Rick. Even when domain settings appear correct and DNS records show green checks, there can be underlying issues preventing sending and receiving emails. Here are some steps you can take to troubleshoot:

1. Check the MX record for the problematic domain. Ensure that WorkMail is the only entry and has the lowest priority. Multiple MX records can cause messages to be routed incorrectly.

2. Verify the DMARC (Domain-based Message Authentication, Reporting, and Conformance) settings for the organization in the Amazon WorkMail console. Incorrect DMARC settings can affect email delivery.

3. Review the Amazon Simple Email Service (SES) inbound rule for the organization. If there are actions other than Amazon WorkMail in the rule, they might be failing and causing WorkMail to stop receiving mail.

4. For outbound mail issues, confirm that your SPF (Sender Policy Framework) record includes Amazon SES. You can check this on the domains page in the WorkMail console.

5. Ensure that Amazon WorkMail has the necessary permissions to use the domain. If you're unsure, try adding the domain again in the WorkMail console. This process can help reset permissions and trigger a workflow to check various domain settings.

6. Enable message tracking in Amazon WorkMail and check the logs for any specific delivery problems. This can provide more detailed information about what's happening with your emails.

7. If the issue persists, you might want to try creating a custom policy in Amazon SES to explicitly authorize WorkMail to send emails on behalf of your domain.

If none of these steps resolve the issue, it may be worth reaching out to AWS support for further assistance, as there could be a more complex underlying problem specific to your account or organization setup.
Sources
Mail routing - Amazon WorkMail
Sending Email failed in Workmail | AWS re:Post
can't send email to workmail | AWS re:Post

I'm sorry, but none of these suggestions worked. Still no mail in or out.

Hi Rick F,

I'm sorry to hear you're experiencing problems with sending mail in one of your organizations. Do the users receive a bounce message when they send an email? Maybe you can enable message logging for that organization to see if any problems are logged? (How to enable message logging: https://docs.aws.amazon.com/workmail/latest/adminguide/monitoring-overview.html)

Kind regards, Robin