I need a classic email system that can be used reliably and stably on the Deltachat client as a relay. I hope this email system is free and that there will be no delay in sending and receiving messages.
I have tried email services like 126 and qq in China, but the results were not satisfactory.
请求一个能在Deltachat客户端上面稳定可靠地使用的传统电子邮件系统来做中继。希望这个电子邮件系统是免费的，并且收发消息不会延迟。
我尝试了中国的126，qq等邮箱，效果都不好。