Вот пример кода для отправки почты с вложением с использованием Exchange Server 2003 с WebDav
System.Net.HttpWebRequest PUTRequest;
System.Net.WebResponse PUTResponse;
System.Net.HttpWebRequest MOVERequest;
System.Net.WebResponse MOVEResponse;
System.Net.HttpWebRequest PROPPATCHRequest;
System.Net.WebResponse PROPPATCHResponse;
System.Net.HttpWebRequest PUTRequest1;
System.Net.WebResponse PUTResponse1;
System.Net.CredentialCache MyCredentialCache;
string strMailboxURI;
string strSubURI;
string strTempURI;
string strServer = "mail.server.com";
string strPassword = "password";
string strDomain = "domain";
string strAlias = "alias@serve.com";
string strTo = "to@server.com";
string strSubject = "Webdav message";
string strBody = "This message was sent using WebDAV.";
byte[] bytes = null;
System.IO.Stream PUTRequestStream = null;
System.IO.Stream PUTRequestStream1 = null;
System.IO.Stream PROPPATCHRequestStream = null;
System.IO.Stream PROPPATCHRequestStream1 = null;
try
{
// Build the mailbox URI.
strMailboxURI = "https://" + strServer + "/exchange/" + strAlias;
// Build the submission URI for the message. If Secure
// Sockets Layer (SSL) is set up on the server, use
// "https://" instead of "http://".
strSubURI = "https://" + strServer + "/exchange/" + strAlias
+ "/##DavMailSubmissionURI##/";
// Build the temporary URI for the message. If SSL is set
// up on the server, use "https://" instead of "http://".
strTempURI = "https://" + strServer + "/exchange/" + strAlias
+ "/drafts/" + strSubject + ".eml";
// Construct the RFC 822 formatted body of the PUT request.
// Note: If the From: header is included here,
// the MOVE method request will return a
// 403 (Forbidden) status. The From address will
// be generated by the Exchange server.
strBody = "To: " + strTo + "\n" +
"Subject: " + strSubject + "\n" +
"Date: " + System.DateTime.Now +
"X-Mailer: test mailer" + "\n" +
"MIME-Version: 1.0" + "\n" +
"Content-Type: text/plain;" + "\n" +
"Charset = \"iso-8859-1\"" + "\n" +
"Content-Transfer-Encoding: 7bit" + "\n" +
"\n" + strBody;
// Create a new CredentialCache object and fill it with the network
// credentials required to access the server.
MyCredentialCache = new System.Net.CredentialCache();
MyCredentialCache.Add(new System.Uri(strMailboxURI),
"NTLM",
new System.Net.NetworkCredential(strAlias, strPassword, strDomain)
);
// Create the HttpWebRequest object.
PUTRequest = (System.Net.HttpWebRequest)HttpWebRequest.Create(strTempURI);
// Add the network credentials to the request.
//PUTRequest.Credentials = MyCredentialCache;
//add
string strCookies = GetCookieValue(strMailboxURI);
PUTRequest.Headers.Add("Cookie", strCookies);
// Specify the PUT method.
PUTRequest.Method = "PUT";
// Encode the body using UTF-8.
bytes = Encoding.UTF8.GetBytes((string)strBody);
// Set the content header length. This must be
// done before writing data to the request stream.
PUTRequest.ContentLength = bytes.Length;
// Get a reference to the request stream.
PUTRequestStream = PUTRequest.GetRequestStream();
// Write the message body to the request stream.
PUTRequestStream.Write(bytes, 0, bytes.Length);
// Close the Stream object to release the connection
// for further use.
PUTRequestStream.Close();
// Set the Content-Type header to the RFC 822 message format.
PUTRequest.ContentType = "message/rfc822";
// PUT the message in the Drafts folder of the
// sender's mailbox.
PUTResponse = (System.Net.HttpWebResponse)PUTRequest.GetResponse();
PUTResponse.Close ();
//Do the PROPPATCH
string strxml = "<?xml version='1.0'?>" +
"<d:propertyupdate xmlns:d='DAV:'>" +
"<d:set>" +
"<d:prop>" +
"<isCollection xmlns='DAV:'>False</isCollection>" +
"</d:prop>" +
"</d:set>" +
"</d:propertyupdate>";
PROPPATCHRequest =
(System.Net.HttpWebRequest)HttpWebRequest.Create(strTempURI);
//PROPPATCHRequest.Credentials = MyCredentialCache;
PROPPATCHRequest.Headers.Add("Cookie", strCookies);
PROPPATCHRequest.Headers.Set("Translate", "f");
PROPPATCHRequest.ContentType = "text/xml";
PROPPATCHRequest.ContentLength = strxml.Length;
PROPPATCHRequest.Method = "PROPPATCH";
byte[] PROPPATCHbytes = Encoding.UTF8.GetBytes(strxml);
PROPPATCHRequest.ContentLength = PROPPATCHbytes.Length;
PROPPATCHRequestStream = PROPPATCHRequest.GetRequestStream();
PROPPATCHRequestStream.Write(PROPPATCHbytes, 0, PROPPATCHbytes.Length);
PROPPATCHRequestStream.Close();
PROPPATCHResponse =
(System.Net.HttpWebResponse)PROPPATCHRequest.GetResponse();
PROPPATCHResponse.Close();
//Attachment
string FileName = "D:\Samplefile.txt";
string attachURI = strTempURI + "/" + FileName;
PUTRequest1 = (System.Net.HttpWebRequest)HttpWebRequest.Create(attachURI);
//PUTRequest1.Credentials = MyCredentialCache;
PUTRequest1.Headers.Add("Cookie", strCookies);
PUTRequest1.Method = "PUT";
System.IO.FileStream inFile;
byte[] binaryData;
inFile = new System.IO.FileStream(FileName, System.IO.FileMode.Open, System.IO.FileAccess.Read);
binaryData = new Byte[inFile.Length];
long bytesRead = inFile.Read(binaryData, 0, (int)inFile.Length);
inFile.Close();
PUTRequest1.ContentLength = binaryData.Length;
PUTRequestStream1 = PUTRequest1.GetRequestStream();
PUTRequestStream1.Write(binaryData, 0, binaryData.Length);
PUTRequestStream1.Close();
PUTResponse1 = (System.Net.HttpWebResponse)PUTRequest1.GetResponse();
// Create the HttpWebRequest object.
MOVERequest = (System.Net.HttpWebRequest)HttpWebRequest.Create(strTempURI);
// Add the network credentials to the request.
//MOVERequest.Credentials = MyCredentialCache;
//add
MOVERequest.Headers.Add("Cookie", strCookies);
// Specify the MOVE method.
MOVERequest.Method = "MOVE";
// Set the Destination header to the
// mail submission URI.
MOVERequest.Headers.Add("Destination", strSubURI);
// Send the message by moving it from the Drafts folder of the
// sender's mailbox to the mail submission URI.
MOVEResponse = (System.Net.HttpWebResponse)MOVERequest.GetResponse();
Console.WriteLine("Message successfully sent.");
// Clean up.
PUTResponse.Close();
MOVEResponse.Close();
}
catch (Exception ex)
{
}