It doesn’t work with Yahoo Mail Classic or New Yahoo Mail.
Mail plus has the read receipt option, but it is not a free service.
Note: even when using mail plus or any of the other mail progs, you do not have the guaranty that you get a read receipt because a recipient can opt out of sending such notices. Reason behind this: by denying a read receipt, you make sure that spammers don’t know whether they hit a real mail address.
There is a program called “SpyPig” which could help you get read receipts. But it only works if both sender and receiver allow html-mail. Because in html-mail you can include tracking cookies which notify you when an e-mail is opened. It’s exactly the kind of program SPAMMERS use, and therefore you should never allow html-mail…
This is for Yahoo Mail
It doesn’t work with Yahoo Mail Classic or New Yahoo Mail.
Mail plus has the read receipt option, but it is not a free service.
Note: even when using mail plus or any of the other mail progs, you do not have the guaranty that you get a read receipt because a recipient can opt out of sending such notices. Reason behind this: by denying a read receipt, you make sure that spammers don’t know whether they hit a real mail address.
There is a program called “SpyPig” which could help you get read receipts. But it only works if both sender and receiver allow html-mail. Because in html-mail you can include tracking cookies which notify you when an e-mail is opened. It’s exactly the kind of program SPAMMERS use, and therefore you should never allow html-mail…
Sorry, can’t tell you about Hotmail and Gmail.