No the default font in under mail format in Outlook is Arial 10. To create the signature we go into Signatures, New, Advanced Edit and then create the signature in Word. We type the text choose the font, size and colour and insert our company logo as a small image. The fonts pretty much always remain as Arial when we create a new email but the first and last lines nearly always change. Sometimes it may change size but will regularly change font to Times New Roman. On occasion it will not change but this tends to be when we respond to certain emails.