How to attach a zip file to eml

[mechadioz]

I am trying to attach a zip file to eml body, I am able to add the same but not able to open it. Seems like the file is corrupted. This is how I am using to add attachment. Please help me with correcting the same.

attachments: [
{
name: "MyFile.zip",
contentType: "application/zip",
contentDisposition: 'attachment; filename="MyFile.zip"',
data: myBase64String,
inline: true,
},
],