I’m attempting to send an email that includes an image as an attachment through Mailgun in my Parse cloud function. The email gets to the recipient without a problem, but the attachment is absent.
Here’s how I’ve set up the cloud function:
Parse.Cloud.define("sendMailWithImage", function(req, res) {
var MailgunLibrary = require('mailgun');
MailgunLibrary.initialize('mywebsite.com', 'API_KEY');
MailgunLibrary.sendEmail({
to: "[email protected]",
from: "[email protected]",
subject: "Testing Image Attachment",
text: "This email contains an image attachment!",
attachment: "U29tZSBpbWFnZSBkYXRh"
}, {
success: function(response) {
console.log(response);
res.success("Email sent successfully!");
},
error: function(response) {
console.error(response);
res.error("Error while sending the email");
}
});
});
Even though the email is received, it lacks the image attachment. What format should I be using for image data when attaching images with Mailgun in Parse cloud code? Is there a specific requirement for the attachment parameter?
You’re encountering this issue because Parse-Mailgun doesn’t accept the attachment in the current format. Rather than using a simple string for the base64 data, it requires a structured object. You should wrap the base64 data with additional metadata: the attachment parameter must include the data as a Buffer object, along with a filename and content type. This structured format is crucial for Mailgun’s proper processing. I’ve faced similar problems before with Parse cloud functions due to these formatting requirements. Additionally, ensure that your base64 string is valid image data and hasn’t been truncated when sent to the cloud function.
Had this exact issue a few months back on a similar project. You’re passing the base64 data directly as a string, but Mailgun expects attachment data in a different format through Parse’s implementation. Create a Buffer from your base64 string and add the metadata. Change your attachment parameter to an object like this: attachment: { data: Buffer.from("U29tZSBpbWFnZSBkYXRh", "base64"), filename: "image.jpg", contentType: "image/jpeg" }. The Parse Mailgun library needs this structured approach - won’t work with just the raw base64 string. Also double-check that your base64 string is actually valid image data. I wasted hours debugging once only to find out my base64 encoding was corrupted.
Yeah, this trips up a lot of people with Mailgun integration. Even for single files, attachments need to be an array. Wrap it like this: attachments: [{ data: Buffer.from("U29tZSBpbWFnZSBkYXRh", "base64"), filename: "test.png", contentType: "image/png" }]. Also notice it’s attachmentS with an S, not attachment.