Moral Question: Is it right to traking people email online

[Myles A. Braithwaite]

I am currently creating an web based project manager that will do a 
number of things including an area where a user will be able to forward 
an email to the site and it will save on to the database. This will be 
done by sending an email to the projects name converted to a MD5 sum @ 
what ever the domain. But this will allow users to set reply-to to said 
email address, thought at a design/development point I have no problem, 
it seems that is is more of a moral issues. Do you think that it would 
be wrong of me to do something like this? Or should I just not release 
the email address to users, making them just use the Thunderbird Plugin?