Changing default font type on all emails the system sends

Product Support
2

Your markup looks correct. What email client are you testing this on? Not all email clients support the use of web fonts. I don’t think Gmail supports web fonts.

Try adding a div with the class you are wanting to style directly to the invite template and then adding styles to the class to the Email Style / CSS editor. Discourse will substitute the styles you add there directly into the div that you target with a class. For example, with the Invite Mailer template customized to:

<div class="invite">
%{inviter_name} invited you to a discussion

> **%{topic_title}**
>
> %{topic_excerpt}

at

> %{site_title} -- %{site_description}

If you're interested, click the link below:

%{invite_link}
</div>

and the following added to Email Styles / CSS

.invite {
    border: 1px solid red;
}

Invites have a red border around the content.