Cannot send attachment using Resend

[trulysinclair]

Package version

6.12.1

Describe the bug

When sending an email using a class email, everything works until trying to follow the attaching files process. All I get is failures, and upon looking at the error I get "Unable to send email using the resend transport: Response code 422 (Unprocessable Entity)".

export default class ChangelogNotification extends BaseMail {
  subject = 'Tailwind test'

  /**
   * The "prepare" method is called automatically when
   * the email is sent or queued.
   */
  prepare() {
    this.message.to('********@*****.net')
    this.message.html(ChangelogEmail({ text: 'Trust reputation' }))
    this.message.attach(app.makePath('public/deepslate.png'), {})
  }
}

Reproduction repo

No response

[CodingDive]

Same thing happened to me with attach.

embedData fixed the 422 issue and I was able to send my attachment.

const myAttachmentPath = app.publicPath("attachment.png");
const fileBuffer= await fs.readFile(myAttachmentPath );

this.message
 .to(this.props.email)
 .html(html)
 .text(text)
 .embedData(fileBuffer, 'fileName', {
    // encoding: "base64",
    // contentType
    // fileName
 })

[CodingDive]

For those who stumble upon this issue, trying to make a cid attachment, it does not seem to be supported in resend in this moment resend/resend-node#319

[thetutlage]

@CodingDive Thanks for narrowing down the issue. So we just have to wait for Resend to allow this?

[trulysinclair]

@CodingDive Thank you for the embedData tip!