See also

Alternatives

There are several Python libraries for sending email, each with a different focus:

• smtplib + email (standard library) — built into Python, provides low-level SMTP transport and RFC-compliant message construction. Full control, but requires manual MIME assembly for HTML emails with attachments. python-emails builds on top of these modules and adds a higher-level API with HTML transformations, template support, and loaders.

• yagmail — a friendly Gmail/SMTP client that auto-detects content types and simplifies sending. Supports OAuth2 for Gmail and optional DKIM signing. A good choice when you need a quick way to send emails with minimal setup.

• red-mail — advanced email sending with built-in Jinja2 templates, prettified HTML tables, and embedded images. A good fit if you need to send data-driven reports.

• envelope — an all-in-one library with GPG and S/MIME encryption, a fluent Python API, and a CLI interface. The right choice when email encryption or signing is a requirement.

python-emails focuses on HTML email as a first-class citizen: loading HTML from URLs, files, ZIP archives, or directories, automatic CSS inlining and image embedding via built-in transformations, and multiple template engines (Jinja2, Mako, string templates). It also provides DKIM signing and Django integration out of the box.

Acknowledgements

python-emails uses premailer for CSS inlining — converting <style> blocks into inline style attributes for maximum email client compatibility.