Koltrix
Guides
MIME for developers: alternative, related and mixed
Most email bugs with images and attachments are MIME tree bugs. Learn how multipart/alternative, related and mixed nest, with a correct example.
5 min read
Email APIWhy every transactional email needs a plain-text part
The text/plain alternative helps accessibility, privacy-minded readers, smartwatches and some filters. How to generate a good one rather than a strip.
5 min read
- Email API
Attachments in transactional email: size, type, options
Attaching invoices and reports raises size, security and deliverability concerns. When to attach, when to link, and how to keep attachments safe.
4 min read