Coordinating your email and direct mail strengthens offers and increases subscribers. The email inbox is where people engage with content more than any other single place. But the trick for using the inbox to increase subscriptions is to create emails that support your direct mail efforts. Are your email and direct mail campaigns coordinated? Or are they two offers passing in the night? When it comes to conversions, think two channels, one campaign.Here are five tips for creating effective emails that support and complement your existing direct mail campaign.First, coordinate your offersNo matter what segment you're trying to reach, it's best to coordinate the offers you're sending out via email and direct mail. You don't want to confuse your audience or make them wonder whether a better offer might be coming through another marketing channel.And while you're at it, synchronize your creative as well. This way your follow-up email (assuming you mailed the direct mail first) reminds your audience of the previous mailing, further urging them to complete an action. Do this by using a similar look and feel in both the graphics and the text.Timing is key, so overlap your touches