public SmtpBody(MailAddress from, MailAddress to, string subject, string body, SmtpCharsetList charsetList)
{
this.From = from;
this.To = to;
this.Subject = subject;
this.Body = body;
this.CharsetList = charsetList;
this.AttatchedFileList = new List <Attachment>();
this.LinkedResourceList = new List <LinkedResource>();
}
public async Task SendAsync(SmtpConfig smtp, CancellationToken cancel = default)
{
using SmtpClient c = new SmtpClient(smtp.SmtpServer, smtp.SmtpPort);
c.DeliveryMethod = SmtpDeliveryMethod.Network;
c.EnableSsl = smtp.UseSSL;
if (smtp.Username._IsFilled() && smtp.Password._IsFilled())
{
c.UseDefaultCredentials = false;
c.Credentials = new System.Net.NetworkCredential(smtp.Username, smtp.Password);
}
MailMessage mail = new MailMessage(CharsetList.NormalizeMailAddress(this.From),
CharsetList.NormalizeMailAddress(this.To));
Encoding bodyEnc = CharsetList.GetAppropriateCharset(this.Body);
TransferEncoding bodyTran = SmtpCharsetList.GetTransferEncoding(bodyEnc);
byte[] bodyData = bodyEnc.GetBytes(this.Body);
MemoryStream ms = new MemoryStream(bodyData);
AlternateView alt = new AlternateView(ms,
new ContentType("text/plain; charset=" + bodyEnc.WebName));
alt.TransferEncoding = bodyTran;
if (Str.IsEmptyStr(this.Body) == false)
{
mail.AlternateViews.Add(alt);
}
mail.Body = "";
mail.BodyEncoding = bodyEnc;
// HTML メールの場合
if (Str.IsEmptyStr(this.BodyHtml) == false)
{
Encoding htmlEnc = CharsetList.GetAppropriateCharset(this.BodyHtml);
TransferEncoding htmlTran = SmtpCharsetList.GetTransferEncoding(htmlEnc);
byte[] htmlData = htmlEnc.GetBytes(this.BodyHtml);
ms = new MemoryStream(htmlData);
AlternateView alt2 = new AlternateView(ms,
new ContentType("text/html; charset=" + htmlEnc.WebName));
// リソースファイル
foreach (LinkedResource a in LinkedResourceList)
{
alt2.LinkedResources.Add(a);
}
mail.AlternateViews.Add(alt2);
}
// 添付ファイル
foreach (Attachment a in AttatchedFileList)
{
mail.Attachments.Add(a);
}
Encoding subjectEnc = CharsetList.GetAppropriateCharset(this.Subject);
byte[] subjectData = subjectEnc.GetBytes(this.Subject);
string subjectText = string.Format("=?{0}?B?{1}?=", subjectEnc.WebName.ToUpperInvariant(),
Convert.ToBase64String(subjectData, Base64FormattingOptions.None));
if (Str.IsAscii(this.Subject))
{
subjectText = this.Subject;
}
mail.Subject = subjectText;
if (this.ReplyTo != null)
{
// mail.ReplyTo = this.ReplyTo;
mail.ReplyToList.Add(this.ReplyTo);
}
foreach (MailAddress cc in CcList)
{
mail.CC.Add(cc);
}
foreach (MailAddress bcc in BccList)
{
mail.Bcc.Add(bcc);
}
mail.Headers.Add("X-Mailer", XMailer);
mail.Headers.Add("X-MSMail-Priority", MSMailPriority);
mail.Headers.Add("X-Priority", MailPriority);
mail.Headers.Add("X-MimeOLE", MimeOLE);
// SSL 証明書をチェック いたしません！！
RemoteCertificateValidationCallback?sslCallbackBackup = ServicePointManager.ServerCertificateValidationCallback;
if (c.EnableSsl)
{
ServicePointManager.ServerCertificateValidationCallback = (a, b, c, d) => true;
}
try
{
await c.SendMailAsync(mail);
}
finally
{
if (c.EnableSsl)
{
try
{
ServicePointManager.ServerCertificateValidationCallback = sslCallbackBackup;
}
catch { }
}
}
}
