Unfortunately, it is not possible to attach a non-standard font to an email so that it always works, regardless of the font presence in the recipient's system. If the font type you defined does not exist on the recipient's machine, the email client will use a default one (probably: Times New Roman). Text rendering is done in the recipient's email client by using local resources. An email contains only the message text and HTML instructions that tell email clients how this text should be displayed. Keep in mind that any non-standard font type in your emails must also be present in the email recipient's system for this email to be displayed.