E-mail newsletters and alerts are one of the most common communication tools used by local funders, local nonprofits, and community news venues. An estimated 50-70% of e-mails are opened on mobile devices. Making your e-mails mobile friendly is an easy way to enhance engagement and improve open rates.

Mailchimp, a popular service for sending and managing e-mail newsletters and e-mail lists, offers a guide to e-mail on mobile devices.

Check out the "best practices" section, which offers specific tips and examples for content, images, and design that will work best on smartphones. For instance:

"When designing mobile e-mail, we try to follow the mantra: one eyeball, one thumb, and arm's-length.This means that, on a small screen, an e-mail should be easily readable with one eye (The other one is presumably paying attention to traffic -- don't do this!), any links and calls-to-action usable with one thumb, and any text or visual cues large enough so that all of the above can be done comfortably at arm's length."

For instance, if your e-mail newsletter/blast used an HTML template, it's a good idea to make sure that template uses responsive web design, to allow it to adapt to any device.

The tech news site Mashable recommends a list of 32 responsive e-mail templates. While intended for businesses, they could be used by any type of organization or campaign.