How to Set Read Receipt in Outlook 365

Seeing messages being sent or are you lot getting sending errors without something in the Outbox?
This could be a stuck Read Receipt.

As they are invisible in your Outbox, it is kinda tricky to delete them. Y'all can yet do this via ane of the following avant-garde (costless) support tools from Microsoft: MFCMAPI or MDBVU32.

Deleting Read Receipts via MFCMAPI (recommended)
Deleting Read Receipts via MDBVU32

Important!
Earlier doing anything, make sure y'all have a current backup of your mailbox (merely in case).

Deleting Read Receipts via MFCMAPI

MFCMAPI is actually a tool for Outlook MAPI developers but as it provides "depression-level" access to Outlook's data stores, it is as well a handy tool for some advanced troubleshooting.

Nevertheless, brand sure you lot follow the instructions below very closely to prevent making any irreparable mistakes.

Visit the MFCMAPI page on GitHub to download the latest version of MFCMAPI.
- When yous use a 32-fleck version of Outlook, you'll need the file starting with;
  MFCMAPI.exe
- When you lot use a 64-chip version of Outlook, yous'll need the file starting with;
  MFCMAPI.exe.x64
Extract the downloaded file and run mfcmapi.exe from within the extracted binder.
Press OK on the first screen which displays some usage notes.
Choose: Session-> Logon…

Click on prototype to enlarge.
Select your Outlook mail profile or but press OK if yous are not familiar with this dialog.
Double click on the line which has the value for the Default Store cavalcade set up to True.

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Right click on the top-level folder in the left console and cull: Open up contents table.
When you lot are using an Exchange business relationship, this is called "Root – Mailbox" and otherwise it is called "Root Container".

Click on epitome to enlarge.
You should now see an particular with a subject prefixed with the "Read:".

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Select the message and cull: Actions-> Submit-> Abort submit…

Click on prototype to enlarge.
Make certain the bulletin is nevertheless selected and cull: Deportment-> Delete message
Set the option to "Permanent delete passing DELETE_HARD_DELETE (unrecoverable)" and press OK.
Echo the abort and delete steps for each "Read:" message that is in the Root Container folder.
Close all open windows of MFCMAPI.

Open Outlook and notice that the stuck Read Receipt is gone.

Deleting Read Receipts via MDBVU32

The MDBVU32 support tool tin be seen every bit the "grandad" of MFCMAPI.

Even though it is recommended to use MFCMAPI instead, the instructions below can even so be used for whatsoever 32-scrap version of Outlook just are actually only being maintained in case MFCMAPI at some signal drops supports for Outlook 2003 or older.

Download MDBVU32.EXE from Microsoft.
Extract the downloaded file and run mdbvu32.exe from inside the extracted folder.
Printing OK on the first screen.
Select MDB-> Open Message Store and select your default pst-file (the one with the D in front of it) and press Open.
Select MDB-> Open Root Folder

Opening the default bulletin shop in MDBVU32.
Y'all'll notice the "Read:" message in the middle pane called "Messages in Folder".

Read Receipt visible in MDBVU32.EXE.
Select the "Read:" message
In the Operations available select: lpMDB->AbortSubmit() (ON SELECTED MSG)
Press Phone call Office and then OK

Confirm to Abort the submission of the Read Receipt".
Brand sure the message is all the same selected.
In the Operations available select lpFld->DeleteMessages() (ON SELECTED MSGS)
Press Call Function and so OK.
The "Letters in Binder" pane should now exist empty.

Read Receipt deleted through MDBVU32.EXE.
Press Close.
Select MDB-> Store Logoff and then OK then OK over again on the data message.
Select Session-> Logoff.
You lot can at present close the open up window called MDB Viewer Test Application.