I created this templates from scatch. Also this tested using litmus service.
- https://inom-turdikulov.github.io/emails_test/attending.html
- https://inom-turdikulov.github.io/emails_test/introducing.html
- https://inom-turdikulov.github.io/emails_test/r.s.v.p.html
- https://inom-turdikulov.github.io/emails_test/ultherapy.html
- https://inom-turdikulov.github.io/emails_test/upcoming.html
- https://inom-turdikulov.github.io/emails_test/visiting.html