Hi, @mabellecherie !
Thanks for reaching out to us about this.
If I understand correctly, you’re hoping to send an automatic email to your new subscribers with a discount code, is that right? If so, here are a couple options:
Shopify Email
One option is to utilize Shopify Email. While this option does not automatically contact your subscribers upon entering their email for the newsletter, you can set up a campaign every so often to send a welcome email to your new subscribers with a discount code. From your Shopify admin, you can click on Customers > Email subscribers to keep tabs of the new subscriptions to contact them with the discount code. For more information on Shopify Email, check out this link.
Application for “Welcome Email”
Another option you can consider a third-party application to automatically send a welcome email to your new subscribers. Most of these applications will incur a monthly fee but it really does encompass the best of first two options whereby it is automatic and customizable. I would recommend taking a look at our blog post on Email Automation Campaigns to see the best app options for Welcome Emails.
I hope this helps! If you have any other questions, please let me know!
Cheers!