Integration testing against e-mail almost always sucks. EmbeddedMail doesn't remove all of that pain, but it certainly helps it suck less by providing an in-memory SMTP server that you can assert on.
Install-Package EmbeddedMail -Version 0.1.1.11
dotnet add package EmbeddedMail --version 0.1.1.11
<PackageReference Include="EmbeddedMail" Version="0.1.1.11" />
paket add EmbeddedMail --version 0.1.1.11
This package has no dependencies.
This package is not used by any popular GitHub repositories.