Setup checklist#
- ☐ Use a single-column layout that reflows on mobile.
- ☐ Set alt text on every meaningful image and empty alt on decorative ones.
- ☐ Maintain 4.5:1 contrast and at least 16px body text.
- ☐ Include a plain-text alternative and test in dark mode.
Audit checklist#
- ☐ Confirm you are not: text embedded in images with no alt.
- ☐ Confirm you are not: tiny grey text on light backgrounds.
Ongoing monitoring#
- ☐ Weekly: review provider dashboards (Postmaster Tools, SNDS) and bounce logs
- ☐ Monthly: re-run the setup verification after any vendor or DNS change
- ☐ Quarterly: full audit against this checklist
Frequently asked questions#
Does dark mode change email colors?
Some clients invert or adjust colors. Test in Gmail, Outlook, and Apple Mail dark modes and use transparent PNGs where possible.