General limitations of our service

We can't assure a perfect display on all email clients and devices.
__
There are custom fonts related limitations. We can import custom fonts to the HTML design, but the font has to be hosted by the client. Moreover, custom fonts aren't supported on every email client. For example, MS Outlook always will show the safe font, instead of the custom font (learn more about safe fonts on MDN).
__
There is an email length limit on some mobile devices/clients.
__
Images displayed on Outlook are blocked by default.
__
Script (JS, PHP) don't work inside most of the email clients.
__
Cutting-edge front-end techniques don't work in emails (e.g. flexbox, grid), the code must be based on tables.
__
UTMs don't work in links with redirections.
__
Dynamic URL won't work (Outlook, etc.).
__
Video feature doesn't work inside email clients (but video can be sometimes replaced by GIF).
__
The dark mode is a relatively new feature for emails and it's not fully supported yet. However, we can optimize custom HTML or template to dark mode, but as it's not standardized, we can't assure the perfect display on every device and email client.

Responsive emails