No. Uploading custom fonts that are privately licensed would result in a situation in which all customers using our editor can see them. It is not possible to assign a font to a specific account.
Additionally, the use of custom fonts creates the risk of their incorrect display in e-mail clients of your subscribers. One of the best practices in e-mail marketing is the use of the so-called safe fonts, which you will find on the list of fonts in our editor. You can learn more about this in the article The less, the better... a few words about fonts in e-mailing.
However, if you still want to use your own font, we recommend two options:
use our HTML editor
present the text as a picture