Is it OK To Opt Back In User After Making Purchase

1. Can I send an opt-in email?
2. How do you write an opt out email?

Can I send an opt-in email?

An opt-in email is an email that's only sent to subscribers who willingly provided their email address to join your mailing list. Opt-in emails are a form of inbound email marketing, which means you aren't reaching out to random customers to try to drum up interest in your brand or product.

How do you write an opt out email?

Write a line that informs the customer of his ability to opt-out of receiving these messages in the future. For instance, "If you would prefer to not receive future messages from ABC Inc, please click the following link." Post the link and your message at the end of all of your emails to customers.