What Daizy says. But do note that a “read receipt” or “message tag” or any such option will only inform you that the email you sent has been received by the addressee, and at most opened.
It cannot tell you whether the addressee has actually read your email, or whether the addressee has comprehended the contents of the email. What I’m trying to say is that it is possible, at times, for people to open emails and not read them at the time of receipt, or to open emails and just hurriedly glance through the contents without reading critical lines, etc. So, while it is a good indicator of whether the person has received your email, it is not an absolute indicator that your email has been read and/or its contents understood.
The same would apply to msgtag and similar (which I assume works by embedding html in the email that references their site somehow). If someone turns off html (IMHO everyone should turn off all scripting esp. activex, and sometimes html) it won’t work.
I do think it’s ingenious, just can never guarantee than no reciept=not read (or obviously that while reciept=opened, may not be read)
It depends on who you sent the email to: how techie they are, do they read email immediately, etc.
If it’s an important email, you could ask for aknowledgement: “Please let me know you have recieved this…”
PS. I just realised msgtag could put the text of your email on their website, so someone would get a link to their website. Then they definitely can’t read it without triggering a receipt. I wouldn’t recommend this - it’s prone to people saying ‘what is this shit? I won’t bother’ and it never getting read.
Mangetout, one workaround to that is to include a small invisible image embedded within the email. If your email client is set to display html it will load the image, hence downloading the image from it’s location on the web, where you can have a counter that informs you that the email has been read.