What is the best .net bundle for a mailing list service?

Question

.NET

Hello everyone, I plan to make a mailing service (e-mail, social networks, perhaps sms).
A person uploads data using excel files, creates mailing templates + sends out (timers + async). This is the type of service.
Feedback from .net developers tells me to use a proven stack:
.net framework + asp.net mvc 5, as it is battle-tested, plus there are all libraries for importing data and other delights.
Microsoft itself actively encourages the use of
.net core + asp.net core MVC, but reviews say that it is rather crude, plus there are no a number of important libraries (for example, for working with excel, beaten EF core, etc.).
There is also a hybrid option:
.net framework + asp.net core MVC - when it needs to be eaten, I have no idea.
You can get the opinion of an experienced .net developer what to take for this task and why?

Answer 1

Net core is already the second version, not raw for a long time, who told you this, like ASP.Net Core. About Excel - here you are https://toster.ru/q/347077, there are small problems with EF Core, but about broken and buggy, wild exaggeration. Plus, Core is cross-platform, plus you can immediately create Docker containers and upload them to VDS without any problems.