Promo · Arcane
Overall compatibility: 95/100 across 21 email clients · 20 of 21 clients passing (6 clean at 100%) · 154 compatibility warnings (0 error-level) · 19.5KB compiled HTML.
Attribution · React Email
Template adapted from the open-source React Email collection under the MIT License (© Plus Five Five, Inc. / Resend). Full React source code is included.
Client Compatibility
Score: 95/100 · 20/21 passing
Notes on this template
It opens: "Use code SKIN15 Use promo → Some new things Bright morning serum Stabilized vitamin C and humectants to wake up dull skin, smooth after cleansing, lock in with SPF for daytime. Shop the serum → Barrier night cream Ceramides and...". Preheader: "Your Skin promo code". Links: "Use promo →", "Shop the serum →", "Shop the cream →", "Start Exploring →". 7 images, 0 Outlook-only blocks, no dark-mode query, web font.
The spread is what matters on this template: 100 in Superhuman against 58 in Outlook Classic, a 42-point gap across the same file. 6 of the 21 clients render it without a single flagged property. Outlook Classic is the one to preview against after any edit, because it is where this template has the least margin, and the 154 warnings behind that score are concentrated there rather than spread evenly.
At 19.5KB compiled it has roughly 83KB of headroom before Gmail clips the message at 102KB and hides the rest behind a "View entire message" link. Inlined CSS and base64 images both count toward that, so watch it as you add sections.
Safe to customise: The offer, the deadline and the hero image. Promotional mail lives or dies on whether the offer is legible in the preview pane before any image loads.
Leave alone: The alt text on the hero. Images are blocked by default in Outlook and in a large share of Gmail accounts, so the alt attribute is frequently the entire message, and an unstyled empty alt is a blank rectangle where the offer should be.
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