All your past customers who made a purchase from you are automatically added to Omnisend as contacts on your list. However, their status (subscribed, non-subscribed, etc.) depends on the data from your store. If your store provides a contact with a status non-subscribed, then we will mark such customer accordingly.
Also, new subscribers, who sign up for newsletters via Soundest signup forms on your website are added to your contact list. If you use any other signup form tool, use API key to connect it with Soundest.
Data from your online is synchronized once a day, so it means that your contacts list are updated on a daily basis.
One more thing: Tictail users who use Follow Plus app for collecting contacts do not have to do a thing - gathered contacts are automatically added to Soundest. No manual import is required.
Have any additional questions? Feel free to contact us at firstname.lastname@example.org.