We have a problem where we need to be sure that the recipient has received emails because it seems some are not being delivered and disappearing into cyberspace without our knowledge. The recipient must receive emails updating certain orders he is to fulfill and a lost email can result in him not being aware of changes to a product and hence shipping the wrong item! He is based in India and we are in the UK. It's tempting to blame the Indian IT infrastructure and blame every ISP involved, but what we want is a system to alert us if an email has not been delivered.
When an email has "gone missing" we do not receive any undeliverable messages, and therefore assume it has been received when infact it has disappeared into nowhere.
We have tried CC-ing a copy to Hotmail in addition to his regular POP account but sometimes the message doesn't even reach Hotmail.
Using Read Receipts is very tricky as we'd have to spend a long time cross referencing the receipts with the sent emails. Ideally what we need is a way to somehow flag or mark the sent messages once they've been confirmed as received. Both ends are using Outlook 2003 and OL2003 seems to offer various flagging options. This way it would be extremely easy to look at the sent emails and notice any problems.
There might be a possibility of implementing an in-house Exchange Server, but this seems a heavy weight solution to the problem. I suspect there must be an Outlook add-in to do what we need and was wondering if anyone knew of such a program.