Nothing's worse than getting an emailed coupon for something you bought last week, or an over-the-top sales pitch seconds after signing up on a site. Make sure that your triggers are all laid out (based on the list segments in step 1), and that each email in your campaign is directly related to a trigger. Users should always understand why they're getting an email.
How do I access a distribution list in Outlook 2016?
Hi Scott, yes that is correct. Most platforms will not let you upload large customer lists if you do not have specific opt-in dates. However if you can provide the data when the user opted in to receive email notifications from you, then you would be able to import the list. These rules may vary based on different providers, but this is exactly the process for switching email service providers (you have to import customer list in the new provider).