public static void AddAttachment(this MailBuilder builder, IMail messageToAttach)
{
MimeRfc822 rfc822 = new MimeFactory().CreateMimeRfc822();
rfc822.Data = messageToAttach.Render();
builder.AddAttachment(rfc822);
}
public byte[] Send(MailMessage message, bool returnBlob = false, bool needDispositionNotification = false, StandardMailAddress notificationTo = null)
{
// Gestore dei messaggi
MailBuilder builder = new MailBuilder {
MessageID = Guid.NewGuid().ToString(), Subject = message.Subject
};
// Creo il messaggio base
builder.From.Add(new MailBox(message.From.Address, message.From.DisplayName));
builder.Text = message.Body;
builder.Html = message.Body.Replace(Environment.NewLine, "<br />");
// Carico i destinatari A
foreach (var recipient in message.To)
{
builder.To.Add(new MailBox(recipient.Address, recipient.DisplayName));
}
// Carico i destinatari CC
foreach (var recipient in message.CC)
{
builder.Cc.Add(new MailBox(recipient.Address, recipient.DisplayName));
}
//Specifico se notificare al mittente la notifiche di lettura e ricezione
if (needDispositionNotification && notificationTo != null)
{
MailBox originalSender = new MailBox(notificationTo.Address, notificationTo.DisplayName);
builder.RequestReadReceipt();
builder.NotificationTo.Clear();
builder.ReplyTo.Clear();
builder.ReturnReceiptTo.Clear();
builder.NotificationTo.Add(originalSender);
builder.ReturnReceiptTo.Add(originalSender);
}
// Carico gli allegati
foreach (var attachment in message.Attachments)
{
var mime = new MimeFactory().CreateMimeData();
using (var ms = new MemoryStream())
{
attachment.ContentStream.CopyTo(ms);
mime.Data = ms.ToArray();
}
mime.ContentType = ContentType.Parse(attachment.Name.GetMimeType());
mime.FileName = attachment.Name;
builder.AddAttachment(mime);
}
// Priorità
switch (message.Priority)
{
case MailPriority.Low:
builder.Priority = MimePriority.NonUrgent;
break;
case MailPriority.Normal:
builder.Priority = MimePriority.Normal;
break;
case MailPriority.High:
builder.Priority = MimePriority.Urgent;
break;
}
// Genero la mail da spedire
var email = builder.Create();
var sent = false;
var i = 0;
Exception lastException = null;
while (!sent && i < 5)
{
using (var smtp = new Smtp())
{
// Accetto anche i certificati non validi
smtp.ServerCertificateValidate += ServerCertificateValidateCallBack;
// Connessione al server
smtp.Connect(_server, _port, AuthenticationType == MailClient.AuthenticationType.Ssl);
// Attivazione Tls, se richiesta
if (AuthenticationType == MailClient.AuthenticationType.Tls)
{
smtp.StartTLS();
}
// Login, se necessario
if (!UseDefaultCredentials)
{
smtp.UseBestLogin(Credentials.UserName, Credentials.Password);
}
// Imposto il timeout per la richiesta
smtp.SendTimeout = new TimeSpan(0, 0, 0, 0, Timeout);
// Invio e calcolo il risultato
var messageResult = smtp.SendMessage(email);
sent = (messageResult.Status == SendMessageStatus.Success);
try
{
smtp.Close(true);
}
catch (Exception ex)
{
lastException = ex;
}
}
if (!sent)
{
Thread.Sleep(1000 * 30);
continue;
}
i++;
}
if (returnBlob && email != null)
{
byte[] eml = email.Render();
return(eml);
}
if (!sent && lastException != null)
{
throw new Exception("Impossibile inviare il messaggio dopo 5 tentativi.", lastException);
}
return(null);
}
