At JCSC.biz we want to bring you the best solutions we can. And for eMail we feel your best solution is to utilize Google Suite Products and Link them to your Domain. There are other options if you want but none have as many features or the same level of SPAM protection so if you need eMail address for your domain you can get started below.
The alternatives require operating your own server and run the software on it to provide all the features you are looking for. If you want a more SECURE email solution please email me and let me know! We can help you provide more secure communications but it has been a rare request and we have been focused on client demands. There can be benefits of running your own eMail Server, but I use the services provided by Google, and would be my initial recommendation, Please inform me if you have other needs and would like us to provide assistance we are here to help.