I just found out that Gmail does not support the “ask for a read receipt” option:
Can I use ‘read receipts’ with Gmail?
Gmail doesn’t currently offer ‘read receipts,’ but we’re working on many new features to improve our service. To suggest a feature, please contact us
Bummer…
Apparently Microsoft’s Hotmail doesn’t support it also.
Bad luck for all the webmail users that have to confirm the delivery of theirHealth Care Economics assignment…