Migration can actually be a major pain in the ass. Although according to aWeber my list was “substantially clean” but I still needed to get all my readers to reconfirm their subscriptions. After a week I’m still waiting for 70% of them to reconfirm. NOT happy. If I stuck to mailchimp I wouldn’t have had these problems. (Their support guys are good though.)
Do most people open your emails on desktop or mobile? Email messages opened on a mobile device have nearly doubled over the past 5 years, while emails opened on an internet browser have dropped 26% in that same timeframe, according to a study from Return Path. If you find your list trending toward mobile, too, then aim for short email subject lines (35 characters or less). (Not sure how your audience reads your emails? Services like Litmus and Email on Acid can track which devices your subscribers are reading their emails on.)
After you have entered your "List Name" you will need to enter a "List Description." Here is where you will describe the kind of information you'll be sending from this list. There is a 400 character limit for the "List Description." Subscribers will see your "List Description" on the unsubscribe page if they ever go to unsubscribe from your list. Once you are done entering your "List Description" click the "Next Step" button.