Almost every email client supports EML files and Microsoft Outlook has a default mechanism to open an EML file. EML files are plain text and much like HTML. msg file.ĮML file is a standard file format used by many email clients such as Outlook Express, Thunderbird, Gmail etc. Other than that, you can select mail messages and save them as ao. When you Drag and Drop email message from Outlook, it will be in a. It contains email messages as well as senders and receivers information, attachments and links from the emails. MSG file is compatible with all Outlook versions. MSG file stores individual or a single mail message. msg file extension, it will be your MSG file. Microsoft Outlook uses the MSG file format. And, that’s why we are here with this article to help you focus on one conversion scenario i.e., EML to MSG.įor the other case, read our blog on converting MSG files to EML format. MSG is pretty similar to EML in the sense that both file formats store one email message per file, which includes Attachments, senders or receiver’s information, etc.īut, it’s not easy to actually convert from one format to another. While MS Outlook mainly works with PST format, it also supports saving emails in MSG files. Microsoft Outlook is so popular in the arena of email clients, it is the go-to email client for most professionals. Summary: In the given article you’ll find some easy to use methods on how to convert EML to MSG files. Storagecon.STGM_CREATE | storagecon.STGM_READWRITE | storagecon.STGM_SHARE_EXCLUSIVE | storagecon.STGM_TRANSACTED)Ĭs = pythoncom.CoCreateInstance(mapi.CLSID_IConverterSession, None, pythoncom.CLSCTX_INPROC_SERVER, mapi.Modified: Novem| Converter | 4 Minutes Reading Stg = pythoncom.StgCreateDocfile(r"C:\Users\xxx\raw.msg", Inf = mapi.OpenStreamOnFile(r"C:\Users\xxx\raw.eml") Working code: mapi.MAPIInitialize((mapi.MAPI_INIT_VERSION, mapi.MAPI_MULTITHREAD_NOTIFICATIONS)) So it started to work after I have moved from Outlook x86 to 圆4, and I added the following registry keys: Files\\Microsoft Files\\Microsoft are copies of the keys that you can find in: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\ClickToRun\REGISTRY\MACHINE\Software\Classes\CLSID Set Msg = Session.CreateMessageFromMsgFile("c:\temp\test.msg") If using Redemption is an option (I am also its author), it allows to convert an EML file to MSG without using Outlook converter as easily as (in VB script): set Session = CreateObject("Redemption.RDOSession") Also, your code never checks that IConverterSession::MIMEToMAPI returns a success return code. your code is a COM/VSTO addin or Outlook VBA). Perhaps most importantly, as of Outlook 2016, IConverterSession interface only works if your code is running inside the outlook.exe address space (i.e. Secondly, try to open the MSG file in a utility like SSView (it shows the data on the IStorage level) or OutlookSpy (I am its author - click OpenIMsgOnIStg button) - it will show the MSG file data on the MAPI level. Msg = mapi.OpenIMsgOnIStg(0, None, stg, None, 0, mapi.MAPI_UNICODE)Ĭs.MIMEToMAPI(eml, msg, _SMTP | _INCLUDE_BCC)įirstly, sizes don't matter, especially if you compare different file formats. Storagecon.STGM_CREATE | storagecon.STGM_READWRITE | storagecon.STGM_TRANSACTED) Stg = pythoncom.StgCreateDocfile(r"C:\test.msg", MyFactory = pythoncom.ObjectFromAddress(com_classfactory.value, pythoncom.IID_IClassFactory)Ĭs = MyFactory.CreateInstance (None, str(mapi.IID_IConverterSession))Įml = mapi.OpenStreamOnFileW(r"C:\test.eml") IconvOLE.DllGetClassObject(clsid_class, iclassfactory, ref(com_classfactory)) Iclassfactory = uuid.UUID(str(pythoncom.IID_IClassFactory)).bytes_le IconvOLE = ctypes.OleDLL(r'C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLMIME.DLL')Ĭlsid_class = uuid.UUID(str(mapi.CLSID_IConverterSession)).bytes_le Mapi.MAPIInitialize((mapi.MAPI_INIT_VERSION, mapi.MAPI_MULTITHREAD_NOTIFICATIONS)) I'm a little bit lost, any ideas? from win32com.mapi import mapi It creates a msg file but the file is unreadable by Outlook and the size is two times bigger than the input eml file. Using various examples I was able to gather this code, but well, it doesn't work. I'm trying to convert EML file to MSG (Outlook) file using python.
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