Rust 编写的现代一体化开源邮件服务器，支持 JMAP、IMAP 与 SMTP。
Open-source alternatives to Gmail
Google's email service
Gmail website ↗3 open-source alternatives
Open-source alternatives to similar software
E-commerce store building and management
CRM customer relationship management
Automated workflows that connect all kinds of apps
Customer support tickets and help desk
All-in-one CRM for marketing, sales and customer service
Small-business accounting and bookkeeping
Customer support and ticketing system
E-signatures and contract workflows