![Diane Poremsky [Outlook MVP]](http://www.outlook-tips.net/images/2014/MVP_BlueOnly.png)
If you have hidden, unknown messages that won't send, it's most likely read receipts. They are stored as hidden messages at the root level of your mailbox. There are two methods that can be used to delete them: Change the SMTP server for the account to a server you can access send. (Remember to change it back to the one you normally use for the account after they are … [Read more...] about Delete Read Receipts using MFCMAPI
read receipts
Delete Stuck Read Receipts using OutlookSpy
See Delete Read Receipts using MFCMAPI for an alternate method to delete stuck read receipts. MFCMAPI is a standalone program (does not need to be installed) and it works with all versions of Outlook, including Outlook 2010 64 bit. If you have hidden, unknown messages that won’t send, it’s most likely read receipts. They are stored as hidden messages at the root level of … [Read more...] about Delete Stuck Read Receipts using OutlookSpy
Tip 95: Locating Read Receipts
Outlook stores read receipts in the top level of your message store as a hidden message. If you use Send immediately, the receipts are returned immediately, otherwise, the next time you check for new mail, Outlook sends the receipts. If you don't have access to the SMTP server used by the account when you send/receive, you may receive an error when the receipt attempts to … [Read more...] about Tip 95: Locating Read Receipts