Every time someone tries to make a comment on wodrpress blog, e-mail address is required. I'm not sure if this has to be a valid e-mail address or it can be anything. By the way, what the purpose of filling in e-mail is? Blogger doesn't seem to require the same. Thanks a lot!
There is must requirement of valid emails because sometimes Web Site owner needs to verify Email Address.
No its not mostly verified. I always make comments with fake name and emails, and have faced no big issues!