I think that both of these, given the right circumstances, works. The best way around this is when you send your introductory email to put it into simple point form with numbers and 2 or 3 sentences in each number. This is easy to follow.
You can then explain that after they have been members for a week, you will follow up with a more comprehensive email detailing each numbered section. Take each number and send one email per day with full details of the item at that number.
That way they are not bombarded with 101 things they should be doing....and then get halfway down the email and can't really be bothered to read any more because it is too complicated.
Your introductory email should be 10 points with no more than 3 lines of type in each. Your follow up email should detail only one of these points at a time.
I think that both of these, given the right circumstances, works. The best way around this is when you send your introductory email to put it into simple point form with numbers and 2 or 3 sentences in each number. This is easy to follow.
You can then explain that after they have been members for a week, you will follow up with a more comprehensive email detailing each numbered section. Take each number and send one email per day with full details of the item at that number.