Extension lost for an email .msg attachment

itconsult.developer · February 12, 2016, 3:30am

Hi,

In my application I process email with multiple kind of attachments. All works fine, but when an email have .msg attachments, the extension of attachments files is lost.

I use this code:

Dim msg As Aspose.Email.Mail.MailMessage = Aspose.Email.Mail.MailMessage.Load(“FILE_PATH”)

For Each a As Aspose.Email.Mail.Attachment In msg.Attachments

Dim attachmentName As String = a.Name

I have attachment a sample email.

I’m using the last version on the Aspose.Email Library (6.2.0.0).

Can I use a workaround to bypass the problem?

Thanks.

kashif.iqbal · February 12, 2016, 6:41am

Hi,

Thank you for contacting Aspose Support team.

In such case, you can detect the media type of such an attachment and decide if it is another nested message using the following sample code. Please try it at your end and let us know your feedback.

Sample Code:

MailMessage msg = MailMessage.Load(“688502\Email with MSG attachment.msg”);

if (msg.Attachments[0].ContentType.MediaType.Equals(“message/rfc822”))
{
Console.WriteLine(“attachment is another message”);
}

itconsult.developer · February 12, 2016, 7:11am

Hello,

the workaround works, but now I would like to know if this is considered a bug or a “feature”.

I think that the name of the original attachment should not altered by removing the extension, but if this is the normal behaviour of the library I must modify all my code that works with attachments. Instead if it’s a bug I could wait for the fix.

Thanks.

itconsult.developer · February 12, 2016, 8:01am

Sorry,

but I’ve discovered another problem. I’m testing your workaround in a sample application:

string originalName = msg.Attachments[0].Name;

if (msg.Attachments[0].ContentType.MediaType.Equals(“message/rfc822”))

{
originalName+= “.msg”;

}

Then my application save the attachments in the file system or in the database. If I try to open the .msg attachment, Oulook starts and give an error. I have seen that the .msg attachments saved from Aspose.Email.Mail.Attachment are not MSG, but are converted in .EML. If I rename the files in EML Outlook works.

Is this a normal behaviour? Why the library alter the original attachments in this way?

If I undestand, my only option is to convert back .EML to .MSG. Is there a way to get the contents of the original attachment?

Thanks.

kashif.iqbal · February 12, 2016, 8:18am

Hi,

When you load a MSG/EML file in MailMessage, then all it’s nested MSG attachments are also converted to MailMessage/EML and that is why saving it as MSG will raise error when opened with MS Outlook. This is an expected behavior of the API.

In order to save the attachment as MSG file, please try the following code and let us know your feedback.

Sample Code:

MailMessage msg = MailMessage.Load(“688502\Email with MSG attachment.msg”);

if (msg.Attachments[0].ContentType.MediaType.Equals(“message/rfc822”))
{
Console.WriteLine(“attachment is another message”);

//Save attachment to stream
MemoryStream ms = new MemoryStream();
msg.Save(ms);

//load into MailMessage
MailMessage attMsg = MailMessage.Load(ms);

attMsg.Save(“attMsg.msg”, Aspose.Email.Mail.SaveOptions.DefaultMsgUnicode);
}