dmail | Receive your emails from within Discord , with Dmail | Chat library

So I have this big .csv in my work that looks something like this:

I am having trouble sending an email to a list of recipients using an smtp.

I can send the email to the first recipient but not the rest. My recipients are in a list. I have tried turning the list into a string. As well as adding a comma or a semicolon to each email in the list but each to no avail.

My email list is formatted like this:

I am trying to run my ASP.net Core application with docker, but for some reasons each time I try with different approach with the Dockerfile I fail by copying the directory. What am I doing wrong? I tried the step by step guide in Microsoft web using my own proj but with unsuccess.

The cmd error I recieve:

I recently added to my code the JWT method for authenticating users, after implementing all the configuration I am facing Exception at the CreateHostBuilder(args).Build().Run() in the program file. The error I am facing:

System.AggregateException: 'Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Dmail.Core.Application.Login.LoginBL Lifetime: Transient ImplementationType: Dmail.Core.Application.Login.LoginBL': Unable to activate type 'Dmail.Core.Application.Login.LoginBL'. The following constructors are ambiguous: Void .ctor(Microsoft.Extensions.Configuration.IConfiguration) Void .ctor(Dmail.Core.Contracts.IUserRepository))'

This is my configuration for login authentication: