public static IEmailSender NewInstance(
ILogSink logger,
EmailSenderOptions options
)
{
return(new DotNetEmailSender(
logger: logger,
options: options
));
}
public DotNetEmailSender(
ILogSink logger,
EmailSenderOptions options
)
{
ValidateLogger(logger);
ValidateOptions(options);
_logger = logger;
_options = options;
}
private static void SendCore(
EmailSenderOptions options,
EmailMessage incoming
)
{
// compose message from incoming spec
var message = GetMailMessage(incoming);
// compose smtp client from options
var smtp = GetSmtpClient(options);
// Send the message (sync)
smtp.Send(message);
}
private static SmtpClient GetSmtpClient(
EmailSenderOptions options
)
{
// Create a System.Net.Mail.SmtpClient object
// and set the SMTP host and port number
var smtp = new SmtpClient(options.Host, options.Port);
// If your server requires authentication add the below code
// =========================================================
// Enable Secure Socket Layer (SSL) for connection encryption
smtp.EnableSsl = options.EnableSsl;
// Do not send the DefaultCredentials with requests
// Create a System.Net.NetworkCredential object and set
// the username and password required by your SMTP account
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential(options.UserName, options.Password);
// =========================================================
return(smtp);
}
private static void ValidateOptions(EmailSenderOptions options)
{
// throw when null
if (options == null)
{
throw new ArgumentNullException("options");
}
// throw when null/empty
if (string.IsNullOrWhiteSpace(options.UserName))
{
throw new ArgumentException("{UserName} cannot be null or empty.", "credentials");
}
// throw when null/empty
if (string.IsNullOrWhiteSpace(options.Password))
{
throw new ArgumentException("{Password} cannot be null or empty.", "credentials");
}
// throw when null/empty
if (string.IsNullOrWhiteSpace(options.Host))
{
throw new ArgumentException("{Host} cannot be null or empty.", "options");
}
// throw when unpexected range
if (options.MaxDegreeOfParallelism <= 0)
{
throw new ArgumentOutOfRangeException("options", "{MaxDegreeOfParallelism} must be positive integer.");
}
// throw when unpexected range
if (options.Port <= 0)
{
throw new ArgumentOutOfRangeException("options", "{Port} must be positive integer.");
}
}
