Unless you are sending out an email newsletter, stick to one primary message in each email blast. Don’t try to pack ten pounds worth of stuff into a one pound bag. The more information you shove into an email, the higher the possibility the recipient will hit delete. Or worse; unsubscribe.
Keep it focused and to the point. Short sentences and short paragraphs make it easier for your readers and skimmers to absorb. And be sure and use the subject line as the key message grabber.
Readers expect email newsletters to have more content and cover several messages. But you should still keep your messages short and to the point.