Docusign Email delivery issues - docusignapi

Question

I'm experiencing issues with emails not being delivered to recipients for all the envelopes I've created with Docusign demo sandbox account created recently. I've tried email recipients with the domain gmail.com & outlook.com but not sure of the reason why email delivering is failing to these domains. I made sure by verifying Spam folders too but none of them has docusign emails delivered.
Appreciate your help in this regard!!
<?xml version="1.0" encoding="utf-16"?>
<Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<AccountId xmlns="http://www.docusign.net/API/3.0">d80849c3-d316-4747-8616-523bd10a8b3d</AccountId>
<Documents xmlns="http://www.docusign.net/API/3.0">
<Document>
<ID>1</ID>
<Name>Lease.pdf</Name>
<PDFBytes>*****************</PDFBytes>
<FileExtension>.pdf</FileExtension>
</Document>
</Documents>
<Recipients xmlns="http://www.docusign.net/API/3.0">
<Recipient>
<ID>1</ID>
<UserName>Vamsi</UserName>
<Email>********#gmail.com</Email>
<Type>Signer</Type>
<AccessCode xsi:nil="true" />
<CaptiveInfo>
<ClientUserId>1</ClientUserId>
</CaptiveInfo>
</Recipient>
</Recipients>
<Tabs xmlns="http://www.docusign.net/API/3.0">
<Tab>
<DocumentID>1</DocumentID>
<RecipientID>1</RecipientID>
<PageNumber>6</PageNumber>
<XPosition>250</XPosition>
<YPosition>215</YPosition>
<Type>FullName</Type>
</Tab>
<Tab>
<DocumentID>1</DocumentID>
<RecipientID>1</RecipientID>
<PageNumber>6</PageNumber>
<XPosition>70</XPosition>
<YPosition>175</YPosition>
<Type>SignHere</Type>
</Tab>
<Tab>
<DocumentID>1</DocumentID>
<RecipientID>1</RecipientID>
<PageNumber>6</PageNumber>
<XPosition>425</XPosition>
<YPosition>220</YPosition>
<Type>DateSigned</Type>
</Tab>
</Tabs>
<Subject xmlns="http://www.docusign.net/API/3.0">eSign Lease</Subject>
<EmailBlurb xmlns="http://www.docusign.net/API/3.0">Please agree to the Terms and conditions.</EmailBlurb>
</Envelope>
Request has Account Id just in case if what to verify requests generated from this demo Account Id.

Answer 1

Try removing the CaptiveInfo node from the request body (also removing the ClientUserId node that's located within it). DocuSign should send the signing invitation email to the recipient if you omit those elements from the request.