System Alert

It opens: "{webview_text} Hello there! 👋 Just a friendly reminder that we have an upcoming appointment. Date: DD-MM-YYYY Type: Software Demo Duration: 30 minutes Thank you for scheduling the meeting. If you need assistance before the meeting, please call our support line...". Links: "Reschedule", "Cancel", "Ricardo Freire", "Alzea". 1 image, 25 Outlook-only blocks, no dark-mode query, web font.

The spread is what matters on this template: 100 in Apple Mail against 58 in Outlook Classic, a 42-point gap across the same file. 1 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 262 warnings behind that score are concentrated there rather than spread evenly.

At 20.3KB compiled it has roughly 82KB 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 reference numbers, amounts and support link. Transactional mail is read for its data, so put the value the reader came for in the first block rather than below a banner.

Leave alone: The table scaffolding around the detail rows. Outlook derives row height from cell padding and ignores margins entirely, so swapping the tables for divs is what turns a tidy receipt into a stack of touching lines.

Modified it? Check your version against the same 21 clients.