Subject: Test Zip Attachment
From: tester@example.com
To: reviewer@example.com
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="===============2899700414055881751=="

--===============2899700414055881751==
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit

Hi, 

Please check the attached zip file.

Thanks.

--===============2899700414055881751==
Content-Type: application/zip
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="test_data.zip"
MIME-Version: 1.0

UEsDBBQAAAAAACyJc1zvlIadNgAAADYAAAAKAAAAc2VjcmV0LnR4dENPTkZJREVOVElBTDogVEhJ
UyBJUyBBIFNFQ1JFVCBEVU1NWSBaSVAgVEVTVCBGT1IgRExQLlBLAwQUAAAAAAAsiXNcV7unaSkA
AAApAAAABwAAAGNvZGUucHlkZWYgbXlfc2VjcmV0KCk6CiAgICByZXR1cm4gJ3Bhc3N3b3JkMTIz
J1BLAQIUAxQAAAAAACyJc1zvlIadNgAAADYAAAAKAAAAAAAAAAAAAACAAQAAAABzZWNyZXQudHh0
UEsBAhQDFAAAAAAALIlzXFe7p2kpAAAAKQAAAAcAAAAAAAAAAAAAAIABXgAAAGNvZGUucHlQSwUG
AAAAAAIAAgBtAAAArAAAAAAA

--===============2899700414055881751==--