Sending email with attachments from C attachments arrive as Part 1 2 in Thunderbird

Question

I have a C  application which emails out Excel spreadsheet reports via an Exchange 2007 server using SMTP  These arrive fine for Outlook users  but for Thunderbird and Blackberry users the attachments have been renamed as  Part 1 2    I found this article which describes the problem  but doesn t seem to give me a workaround  I don t have control of the Exchange server so can t make changes there  Is there anything I can do on the C  end  I have tried using short filenames and HTML encoding for the body but neither made a difference   My mail sending code is simply this   public static void SendMail string recipient  string subject  string body  string attachmentFilename        SmtpClient smtpClient   new SmtpClient        NetworkCredential basicCredential   new NetworkCredential MailConst Username  MailConst Password       MailMessage message   new MailMessage        MailAddress fromAddress   new MailAddress MailConst Username           setup up the host  increase the timeout to 5 minutes     smtpClient Host   MailConst SmtpServer      smtpClient UseDefaultCredentials   false      smtpClient Credentials   basicCredential      smtpClient Timeout    60   5   1000        message From   fromAddress      message Subject   subject      message IsBodyHtml   false      message Body   body      message To Add recipient        if  attachmentFilename    null          message Attachments Add new Attachment attachmentFilename         smtpClient Send message       Thanks for any help

User · Answer

I tried the code provided by Ranadheer Reddy (above) and it worked great. If you’re using a company computer that has a restricted server you may need to change the SMTP port to 25 and leave your username and password blank since they will auto fill by your admin.

Originally, I tried using EASendMail from the nugent package manager, only to realize that it’s a pay for version with 30-day trial. Don’t waist your time with it unless you plan on buying it. I noticed the program ran much faster using EASendMail, but for me, free trumped fast.

Just my 2 cents worth.

User · Answer

Here is a simple mail sending code with attachment  try           SmtpClient mailServer   new SmtpClient  smtp gmail com   587         mailServer EnableSsl   true         mailServer Credentials   new System Net NetworkCredential  myemail gmail com    mypassword           string from    myemail gmail com         string to    reciever gmail com         MailMessage msg   new MailMessage from  to         msg Subject    Enter the subject here         msg Body    The message goes here        msg Attachments Add new Attachment  D   myfile txt         mailServer Send msg         catch  Exception ex            Console WriteLine  Unable to send email  Error       ex         Read more Sending emails with attachment in C

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Explicitly filling in the ContentDisposition fields did the trick   if  attachmentFilename    null        Attachment attachment   new Attachment attachmentFilename  MediaTypeNames Application Octet       ContentDisposition disposition   attachment ContentDisposition      disposition CreationDate   File GetCreationTime attachmentFilename       disposition ModificationDate   File GetLastWriteTime attachmentFilename       disposition ReadDate   File GetLastAccessTime attachmentFilename       disposition FileName   Path GetFileName attachmentFilename       disposition Size   new FileInfo attachmentFilename  Length      disposition DispositionType   DispositionTypeNames Attachment      message Attachments Add attachment                       BTW  in case of Gmail  you may have some exceptions about ssl secure or even port   smtpClient EnableSsl   true  smtpClient Port   587

User · Answer

Completing the solution of Ranadheer  using Server MapPath to locate the file  System Net Mail Attachment attachment  attachment   New System Net Mail Attachment Server MapPath    App Data hello pdf     mail Attachments Add attachment

User · Answer

private void btnSent Click object sender  EventArgs e        try               MailMessage mail   new MailMessage            SmtpClient SmtpServer   new SmtpClient  smtp gmail com             mail From   new MailAddress txtAcc Text           mail To Add txtToAdd Text           mail Subject   txtSub Text          mail Body   txtContent Text          System Net Mail Attachment attachment          attachment   new System Net Mail Attachment txtAttachment Text           mail Attachments Add attachment            SmtpServer Port   587          SmtpServer Credentials   new System Net NetworkCredential txtAcc Text  txtPassword Text            SmtpServer EnableSsl   true           SmtpServer Send mail           MessageBox Show  mail send              catch  Exception ex                MessageBox Show ex ToString              private void button1 Click object sender  EventArgs e        MailMessage mail   new MailMessage        openFileDialog1 ShowDialog        System Net Mail Attachment attachment      attachment   new System Net Mail Attachment openFileDialog1 FileName       mail Attachments Add attachment       txtAttachment Text  Convert ToString  openFileDialog1 FileName

User · Answer

I ve made a short code to do that and I want to share it with you   Here the main code   public void Send string from  string password  string to  string Message  string subject  string host  int port  string file       MailMessage email   new MailMessage      email From   new MailAddress from     email To Add to     email Subject   subject    email Body   Message    SmtpClient smtp   new SmtpClient host  port     smtp UseDefaultCredentials   false    NetworkCredential nc   new NetworkCredential from  password     smtp Credentials   nc    smtp EnableSsl   true    email IsBodyHtml   true    email Priority   MailPriority Normal    email BodyEncoding   Encoding UTF8     if  file Length  gt  0          Attachment attachment      attachment   new Attachment file       email Attachments Add attachment             smtp Send email     smtp SendCompleted    new SendCompletedEventHandler SendCompletedCallBack     string userstate    sending         smtp SendAsync email  userstate      private static void SendCompletedCallBack object sender AsyncCompletedEventArgs e      string result         if  e Cancelled              MessageBox Show string Format   0  send canceled    e UserState   Message  MessageBoxButtons OK MessageBoxIcon Information         else if  e Error    null          MessageBox Show string Format   0   1    e UserState  e Error    Message   MessageBoxButtons OK  MessageBoxIcon Information         else       MessageBox Show  your message is sended    Message   MessageBoxButtons OK  MessageBoxIcon Information               In your button do stuff like this        you can add your jpg or pdf files and more     this  is just an example   using  OpenFileDialog attachement   new OpenFileDialog       Filter    Exel Client   png     ValidateNames   true      if  attachement ShowDialog      DialogResult OK      Send  yourmail gmail com    gmail password            tomail gmail com    just smile     mail with attachement           smtp gmail com   587  attachement FileName

User · Answer

Try this   private void btnAtt Click object sender  EventArgs e         openFileDialog1 ShowDialog        Attachment myFile   new Attachment openFileDialog1 FileName        MyMsg Attachments Add myFile

User · Answer

Simple code to send email with attachement   source  http   www coding-issues com 2012 11 sending-email-with-attachments-from-c html  using System Net  using System Net Mail   public void email send         MailMessage mail   new MailMessage        SmtpClient SmtpServer   new SmtpClient  smtp gmail com        mail From   new MailAddress  your mail gmail com        mail To Add  to mail gmail com        mail Subject    Test Mail - 1       mail Body    mail with attachment        System Net Mail Attachment attachment      attachment   new System Net Mail Attachment  c  textfile txt        mail Attachments Add attachment        SmtpServer Port   587      SmtpServer Credentials   new System Net NetworkCredential  your mail gmail com    your password        SmtpServer EnableSsl   true       SmtpServer Send mail

User · Answer

Use this method it under your email service it can attach any email body and attachments to Microsoft outlook using Outlook   Microsoft Office Interop Outlook     Reference Microsoft Office Interop Outlook from local or nuget if you will user a build agent later  try                       var officeType   Type GetTypeFromProgID  quot Outlook Application quot                             if officeType    null     outlook is not installed                         return new PdfErrorResponse                               ErrorMessage    quot System cant start Outlook   make sure outlook is installed on your computer  quot                                                   else                              Outlook is installed                                 Continue your work                          Outlook Application objApp   new Outlook Application                            Outlook MailItem mail   null                          mail    Outlook MailItem objApp CreateItem Outlook OlItemType olMailItem                             The CreateItem method returns an object which has to be typecast to MailItem                            before using it                          mail Attachments Add attachmentFilePath Outlook OlAttachmentType olEmbeddeditem 1   quot Attachment ordernumber  quot                              The parameters are explained below                         mail To   recipientEmailAddress                            mail CC    quot con def com quot    All the mail lists have to be separated by the                                    To send email                            mail Send                              To show email window                         await Task Run      gt  mail Display                                                  catch System Exception                        return new PdfErrorResponse                           ErrorMessage    quot System cant start Outlook   make sure outlook is installed on your computer  quot

[c#] Sending email with attachments from C#, attachments arrive as Part 1.2 in Thunderbird

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