Toggle WebFonts on/off in Email Editor to simulate different mail clients

WebFonts work perfectly in Apple Mail, which comprises at least 20% of opens. They emphatically don’t work anywhere else, but with proper fallbacks they’re worth exploring. →

Toggle images on/off in Email Editor to simulate different mail clients

Save yourself a few “Send Sample” runs. →

You should have one (1) rule in Form Editor » Custom CSS

The Custom CSS box is good for one thing, and that’s loading external stylesheets. But you have to do it right. →

Your choice: Scylla, Charybdis, or returning 𝑛𝑢𝑙𝑙 in Velocity

Velocity loosens Java’s rules about types and nulls, but that causes more confusion than good. →

Properly trimming Strings in Velocity takes more than trim()

It’s almost certain that Velocity’s (that is, Java’s) trim() doesn’t do what you consider “trimming whitespace.” →

Show Known Visitor HTML on other open tabs after a form submit

A fun use for BroadcastChannel, a browser feature typically used by web apps (not mere LPs). →

Creating DNS CAA records for Marketo-hosted domains

If you can make IT happy with minimal impact, do it. (But stay skeptical of claimed “security issues” in any MAP, as they’re usually false alarms.) →

Adding hidden fields (e.g. UTMs) to Marketo Dynamic Chat dialogues

They’ll tell you it can’t be done. But they didn’t count on the power of having no social life. →