I'm sorry to hear you're experiencing problems receiving mail. This can have various reason but is easy to verify. To start you can check if your MX record points to WorkMail and only WorkMail (in the correct region). You can find the required MX record value in the domain details page in the WorkMail console. (This page will also inform you if it detects a incorrect value)
If you MX domain record correctly points to WorkMail you can verify that you do not have any failing SES inbound rules. In the SES console you can verify that the active Inbound rule only has a WorkMail action. If there are other actions, you need to make sure they work.
If that is all correct you can check the WorkMail console for configured inbound rules to ensure that no mail is dropped.
These steps should be enough to troubleshoot the inbound mailflow and enable you to receive mail in WorkMail.
Kind regards, Robin
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