Unable to send email to XXXX@qudol.net using Azure Email Communication Service
Issue exists only for emails to this domain (qudol.net)
We have no problem sending email to this address from any other client.

Package version
@azure/communication-email": "^1.0.0-beta.2

Error from beginSend() function
RestError: Requested message could not be located. Couldn't find a record with the messageID: XXXX

Communication service diagnostic log
RecipientId: XXXX@qudol.net
DeliveryStatus: Failed

After digging into the sdk code, we found the below error,

error.code: 'EmailDroppedAllRecipientsSuppressed'
error.message: 'Email was dropped because all recipients were suppressed. You will get a dropped event for each suppresssed recipient through event grid or Azure monitoring.'

Reproduce the issue by,
Using sample code from the below nodejs script. Just supply the recipient as any XXXX@qudol.net
https://github.com/azure-samples/communication-services-javascript-quickstarts/tree/main/send-email