Hi, I'm a developer and I've been thinking of developing on Zimbra's original Open Source code. I've read over the YPL license and I'm not quite clear on a couple of things and I was hoping you guys can help me out.
My Goal: Is to basically be able to provide my users with a place where they can sign up for free email accounts.
1. After I build out my new version of Zimbra's email, is it possible to remove the Zimbra logo on the top left?
2. Can I use it for commercial use on my own website - for example, let users register and have an email account?
3. If I develop the Zimbra's email out to an almost completely different creature, can it reach a point where I don't have to abide by the YPL license?
Thanks in advance for any help or advice you can offer. I just don't want to have any licensing problems with how I use Zimbra 5 years down the line, after building it out and putting so much time into it.