system.net.mail

I have been asked to look into a bulk emailer for an intranet system and wanted some advice. Currently we use System.Net.Mail and send the emails synchronously via the customers own smtp server, typically Microsoft exchange. If we were allow them to send emails to larger and larger groups what sort of pitfalls will I likely face? I have considered that I may need to look at sending them asynchronously, is it quicker to send one email to a large distribution list rather than an email to each recipient. Any advice would be greatly appreciated Sending to a distribution list will be faster for the

I'm using System.Net.Mail to send out a few emails. The emails are being sent by our internal mail server to local addresses. However all of the messages are going straight to junk in Outlook. The messages are being sent from valid email addresses. What would be causing our our servers to label it as junk? MailMessage msg = new MailMessage(); msg.IsBodyHtml = true; msg.Subject = subject; msg.Body = body; msg.From = new MailAddress(from); msg.To.Add(to); SmtpClient client = new SmtpClient(server, 25); client.Send(msg); I've seen this happen a lot when the outgoing SMTP is sending directly

The SmtpClient send method returns void. Is there any way to get the server response? Do I just assume it was successful unless it throws an exception? The class I'm referring to... http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient.aspx To answer your second point, yes, all you can do is assume it's successful - meaning it got the message to the server and the server accepted it, unless you get an exception. You probably already know the rest of this, but just in case... From there, the email could get lost and not delivered any number of ways. Your server may accept it and

I'm trying to use the AlternateView to cater for both HTML and Text clients. I would prefer to use HTML and only fall back to text where necessary. I started re-coding an old console app to do this but I still have carriage returns and newlines as "/r/n" in my code and my problem is trying to figure out how and where to use Environment.Newline instead of these? Right now, the console application is being called from a Web form. I'm experiencing some difficulties debugging and the eventual plan is to create a WCF service for this. I think the difficulty I'm having is determining what

When I sent a mail using System.Net.Mail, it seems that the messages do not send immediately. They take a minute or two before reaching my inbox. Once I quit the application, all of the messages are received within seconds though. Is there some sort of mail message buffer setting that can force SmtpClient to send messages immediately? public static void SendMessage(string smtpServer, string mailFrom, string mailFromDisplayName, string[] mailTo, string[] mailCc, string subject, string body) { try { string to = mailTo != null ? string.Join(",", mailTo) : null; string cc = mailCc != null ? string

_data is a byte[] array of Attachment data. When I'm doing this: var ms = new MemoryStream(_data.Length); ms.Write(_data,0,_data.Length); mailMessage.Attachments.Add(new Attachment(ms, attachment.Name)); Attachment comes empty. Actually outlook shows the filesize but it's incorrect. Well, I thought there is a problem in my _data. Then I decided to try this approach: var ms = new MemoryStream(_data.Length); ms.Write(_data,0,_data.Length); fs = new FileStream(@"c:\Temp\"+attachment.Name,FileMode.CreateNew); fs.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length); fs.Flush(); fs.Close(); mailMessage