Send email from Outlook Express in C#

As others have pointed out you better use the System.Net.Mail if you simply want to send a mail. If for whatever reason you want to send mails using Outlook you'll have to use Office interop. Something like this: using Outlook = Microsoft.Office.Interop.Outlook; Outlook.Application oApp = new Outlook.Application(); Outlook.MailItem email = (Outlook.MailItem)(oApp.CreateItem(Outlook.OlItemType.olMailItem)); email.Recipients.Add("[email protected]"); email.Subject = "Subject"; email.Body = "Message"; ((Outlook.MailItem)email).Send();

If you are looking to compose an email using the user's default e-mail client, try this: using System; using System.Diagnostics; namespace RunMailTo { class Program { static void Main(string[] args) { Process.Start("mailto://[email protected]"); } } } You can add additional parameters to the mailto: URL to set the subject, body, etc. See http://msdn.microsoft.com/en-us/library/aa767737%28VS.85%29.aspx for more information.

It is not true. Outlook Express has its own API. Please look at: http://msdn.microsoft.com/en-us/library/ms710250%28VS.85%29.aspx http://www.codeproject.com/KB/COM/Outlook_Express_Messages.aspx