This method will introduce a VBA to automatically save every incoming email in Outlook as individual HTML file to the specific disk. Please do as follows:

1. Press Alt + F11 keys to open the Microsoft Visual Basic for Applications window.

2. Expand the Project1, and double click ThisOutlookSession to open it, and then paste below VBA code into the ThisOutlookSession window. See screenshot:

VBA: Automatically save Outlook emails as HTML files to disk

Private WithEvents InboxItems As Outlook.Items
Sub Application_Startup()
Dim xNameSpace As Outlook.NameSpace
Set xNameSpace = Outlook.Application.Session
Set InboxItems = xNameSpace.GetDefaultFolder(olFolderInbox).Items
End Sub

Private Sub InboxItems_ItemAdd(ByVal objItem As Object)
Dim FSO
Dim xMailItem As Outlook.MailItem
Dim xFilePath As String
Dim xRegEx
Dim xFileName As String
On Error Resume Next
xFilePath = CreateObject("WScript.Shell").SpecialFolders(16)
xFilePath = xFilePath & "\MyEmails"
Set FSO = CreateObject("Scripting.FileSystemObject")
If FSO.FolderExists(xFilePath) = False Then
FSO.CreateFolder (xFilePath)
End If
Set xRegEx = CreateObject("vbscript.regexp")
xRegEx.Global = True
xRegEx.IgnoreCase = False
xRegEx.Pattern = "\||\/|\<|\>|""|:|\*|\\|\?"
If objItem.Class = olMail Then
Set xMailItem = objItem
xFileName = xRegEx.Replace(xMailItem.Subject, "")
xMailItem.SaveAs xFilePath & "\" & xFileName & ".html", olHTML
End If
Exit Sub
End Sub

3. Save the VBA code, and restart your Microsoft Outlook.

From now on, each incoming email will be saved as individual HTML file into the “MyEmails” folder.

Notes:
(1) This VBA will create a folder named “MyEmails” under the Documents folder. You can find out the automatically saved emails with this folder path: C:\Users\your_user_name\Documents\MyEmails
(2) This VBA will works with emails received in the Inbox folder of default email account.

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