Interspire Email Marketer is a fully featured self-hosted email marketing automation solution that was built to help you with your email marketing activities.
Demo: https://www.interspire.com
Our solution makes you faster, more convenient, easier and safer, sending messages in batches, inviting users in batches, querying groups in batches, querying users in batches, and providing all C# source code.
Demo: https://codecanyon.net/item/telegram-marketer-tools-6/33837496