IMailService

public interface IMailService

{

    Task SendEmailAsync(MailRequest mailRequest);

}

public class MailService : IMailService

{

    private readonly MailSettings _mailSettings;

    public MailService(IOptions<MailSettings> mailSettings)

{

        _mailSettings = mailSettings.Value;

}

    public async Task SendEmailAsync(MailRequest mailRequest)

{

        var email = new MimeMessage();

        email.From.Add(new MailboxAddress(_mailSettings.DisplayName, _mailSettings.Mail));

        email.To.Add(MailboxAddress.Parse(mailRequest.ToEmail));

        email.Subject = mailRequest.Subject;

        var builder = new BodyBuilder();

        builder.HtmlBody = mailRequest.Body;

        email.Body = builder.ToMessageBody();

        using var smtp = new SmtpClient();

        smtp.Connect(_mailSettings.Host, _mailSettings.Port, SecureSocketOptions.StartTls);

        smtp.Authenticate(_mailSettings.Username, _mailSettings.Password);

        await smtp.SendAsync(email);

        smtp.Disconnect(true);

}

}