NewSender creates a new Sender instance and returns it.

BaseTmpl represents the base template used by emails.

ErrFakeSenderFailure represents a fake sender failure.

ErrSenderNotAvailable error indicates that there is not a mail sender available.

Data describes the different pieces of data used to compose an email.

Sender is in charge of sending emails.

SenderMock is a mock implementation of the hub EmailSender interface.