Resources

A collection of email coding–related resources.

Feel free to edit this page and suggest additions or updates!

Guides

jonathandion/awesome-emails: A collection of awesome frameworks, templates, tools, workflows and many more to build better emails.
Good Email Code: Snippets and guides on things like buttons, CSS triangles, SVG and VML, and CSS units (rem, em, px).
Email Coding Guidelines: Another great guide to making sure your emails get displayed as intended.
2020 State of Email Workflows: Litmus' report on how marketers organize their email-creation workflows. (Note this report is a list-building mechanism for Litmus itself.)
WebAIM's guide to alternative text: Images don't always load in emails, and knowing when and how to write alternative text is a key skill.

mail-tester.com: Test the spammyness of your emails.
caniemail.com and caniuse.email: Similar projects on HTML and CSS element compatibility, inspired by caniuse.com
Detergent: Strips a configurable list of HTML tags for safe emailing. Premail uses it internally!
email-bugs: Documents all of the bizarre behavior of email and webmail applications.
esp-html-bugs: Like email-bugs but as it applies to email service providers (Mailchimp, Constant Contact, etc.)

email-verifier: A Go-based tool that verifies if an email address is valid without sending any emails.
SpamHaus reputation checker: See if your domain name or IP address is on a blocklist.
EmailDestinations: A spreadsheet tool that allows you to group recipients by destination, not just domain name (e.g. outlook.com, hotmail.com, live.fr would all be grouped under Microsoft).

Email Geeks Slack channel: Where email marketers, designers, and developers meet to talk shop.
TidyMails: A (non-selective) current snapshot of commercial email newsletters.
SaaS Email Templates: Examples of emails, including transactional emails, from popular Software-as-a-Service companies.