The document discusses challenges with sending HTML emails. It notes that email clients like Gmail have inconsistent support for CSS, images, and other HTML elements. It recommends using inline CSS, JPG/GIF images hosted externally, and HTML tables for layout instead of modern CSS techniques to achieve more consistent rendering across clients. External links are provided for further resources on allowable CSS, inline CSS tools, and HTML email templates.

1. HTML Mail ...
Dave Jacoby
Purdue Perl Mongers

2. “Email Hates The Living”
-@rjbs

3. Why Would
You Do
This?

6. Spammers
Newsletters
CAN-SPAM

7. Not Going To Show Code
Fallback to Text Mail
Try Email::MIME::Kit

8. Problems:
HTML and CSS
Images

9. Inconsistent
Rendering
Engines

10. Gmail says “no”
to much of CSS

11. Gmail says “no”
to <style>

12. Therefore,
Inline CSS

14. Most formatting tags
are inconsistent
or disallowed

15. Therefore,
Tables

17. Images

18. Images make
HTTP requests

20. Embedded Images?

21. Gmail says “no”
to Embedded Images

22. Attached Images?

23. Gmail says “no”
to Attached Images

24. So, Web Images

25. Also, no PNG

26. Also, no SVG

27. Also, no Javascript

29. Tables for Page Layout
Inline CSS
No CSS3
JPG or GIF

31. Email Hates the Living: https://www.youtube.com/watch?
v=4s9IjkMAmns
CSS Inliner: http://templates.mailchimp.com/resources/inline-
css/
Allowable CSS: https://www.campaignmonitor.com/css/
ALA Salted Email Template: https://github.
com/alistapart/salted/