Nodemailer Attachment Builder

nodemailer-build-attachment is a utility package designed to simplify the creation and streaming of email attachments for use with Nodemailer. It builds attachment content, allowing input from various sources like file streams, and processes it into a format suitable for email transmission, typically a `base64` encoded string. The package is currently at version 3.0.0. Its release cadence is not explicitly stated in the provided documentation, and the latest major release dates back approximately five years. A key differentiator is its specialized focus on processing stream content for attachments, building upon the `buildmail` library for robust email part construction, rather than being a general email sending library itself.