Copy in Arial 10pt:
Visibility studies indicate that the best fonts for email communications are Arial 10pt and Verdana 10pt. It is highly recommended not to use fonts less than 10pt under any circumstance. If you decide to send your email message in 12pt, use Arial. Arial and verdana are standard default fonts and are therefore generally accepted.

Copy in Verdana 10pt:
Visibility studies indicate that the best fonts for email communications are Arial 10pt and Verdana 10pt. It is highly recommed not to use fonts less than 10pt under any circumstance. If you decide to send your email message in 12pt, use Arial.

Copy in arial 12pt:
Visibility studies indicate that the best fonts for email communications are Arial 10pt and Verdana 10pt. It is highly recommed not to use fonts less than 10pt under any circumstance. If you decide to send your email message in 12pt, use Arial.