I'm aware of one MSG format component from IndependentSoft but haven't tried it personally. You may also want to try a third-party component. There is MSG format specification on Microsoft site. MSG format is a email message format introduced by Microsoft in Microsoft Outlook.
TODO: fill the stream, seek to the beginning MemoryStream stream = new MemoryStream() load the message from a local disk file
READ EML FILE WITH EAGETMAIL VB.NET CODE
The code is based on Mail Message tutorial. Until it changes I would suggest getting a third party MIME parser from an established vendor.įollowing code uses our Rebex Secure Mail component, but I'm sure that similar task could be replicated easily with components from other vendors as well. Right now is no such parser included in the. Maturing of such parser takes years and continuous feedback for it's users.
making sure that it handles correctly very big emails. handling hierarchical messages (message with attached messages). making sure that malformed message will not result in buffer overun or other application crash. Convert Outlook MSG file to RFC822 message file (.eml) VB.NET - Export emails from Outlook PST file to RFC822. 
making sure that it parses correctly a MIME torture message from Mike Crispin (coauthor of Mime and IMAP RFCs) VB.NET - Mark email as read in POP3/IMAP4/EWS/WebDAV. dealing with inline images and stylesheets embedded into HTML emails. dealing correctly with several methods of encoding attachments. dealing with S/MIME (encrypted and signed email messages). correcting malformed EML files caused by well known errors in popular mail clients and servers. I know, because I involved in developing one. Remaining 5% would take at least several months -). You can write an implementation working in 95% cases within few days. Loading an EML file correctly is not as easy as it looks. Common sources of EML files include messages saved from Outlook Express or Thunderbird, messages downloaded from IMAP or POP3 servers. 
EML are in most cases MIME encoded files with mail messages.
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