Here's how to tell if your email list has the winter blahs:
* Your opt-ins are growing, but your email open and click-through rates are plummeting faster.

* You bounce more email every time you send.

* More than half of your list hasn't opened or acted on a single email in the last six months.

Email deliverability has always been a concern for email marketers, but the constantly changing landscape makes it even more difficult to ensure great delivery of your email marketing campaigns. How do you keep up with current changes to ISPs, ESPs, legislation, opt-in vs. opt-out, open and click-through rates? What are the latest best practices? Do you know fact vs. fiction when it comes to deliverability? Do you know your own email delivery rate?

Marketers, it's time to put down the fire hose. Your email subscribers are more sophisticated today and more particular about what they want to receive - and it's not a steady stream of undifferentiated messages blasted relentlessly to a mass audience.

Looking back on MarketingSherpa's fifth annual Email Marketing Summit, I'd say it was a very good event for more than 600 marketers and the Lyris team. There were a number of talented speakers and contributors who always make Email Summit a good investment for teams focused on email and online marketing.