Hello, In the recent nightly, return receipts is implemented. Here is a suggestion.
In Netscape 4.7x, a message with receipt has a flag in some where user can see. Hope it will be added in the later release. It can be a flag in "Send Folder" or any other way that user can identify his message got receipt or not. Sorry I always forgot if I added a receipt or not after delivering. Thanks for your effort. :-)
