Blog
Email development techniques, results from our tests in real email clients, and guides for teams that build campaigns.
Email emoji compatibility 2026: safe emojis for subject lines
See which emojis display correctly in Gmail, Outlook, Apple Mail, and other email clients, based on Better Email tests across 17 clients.
Nicki Pabst Rasmussen
Unicode 18.0 has nine new emojis, but email support will take time
Unicode 18.0 adds nine new emojis, including a pickle and a meteor. Why they are not safe for email campaigns yet, and what to do meanwhile.
Nicki Pabst Rasmussen
New emojis and why you cannot use them yet
The new emojis in Unicode 17.0, how each one could be used, and why our test across 17 email clients says to wait before using them.
Nicki Pabst Rasmussen
How to add audio to an HTML email
Which email clients play native HTML audio, the production code we use with fallbacks for every client, and what to know about hosting and tracking.
Nicki Pabst Rasmussen
MSO attributes in Outlook emails
How conditional comments and mso- CSS properties fix Outlook rendering, with code for each useful property, a reset block, and the complete list.
Nicki Pabst Rasmussen
939 new fonts for Outlook
Outlook renders 939 fonts from Microsoft's cloud, not just the nine web-safe ones. The full list, and how to use it in your email font stacks.
Nicki Pabst Rasmussen
Calendar links in email
Why add-to-calendar links break in many email clients, and the button and ICS approach that works everywhere, with the code.
Nicki Pabst Rasmussen
Preview text expander
Updated code that pads short preview text so email clients do not fill the inbox preview with text from the email body.
Nicki Pabst Rasmussen
Know your marketing permission
The EU and Danish rules for email marketing consent: double opt-in, consent checkboxes, and what a valid consent has to include.
Nicki Pabst Rasmussen
BIMI: your brand’s email identity
What BIMI is, which inboxes show your logo next to the sender name, and how to set it up with SPF, DKIM, DMARC, and a VMC.
Nicki Pabst Rasmussen
The perfect button
HTML for transparent, full-color, hover, and square email buttons that work in Outlook, with VML fallbacks and a Liquid width calculation.
Nicki Pabst Rasmussen