Shirish,

"Now I have the email list. I have saved them. Does it mean that  I can use those emails and spoil the voting system?"
Answer: You cannot, unless you hack the web server of the online voting company. ANA is using - https://www.balloteer.com.

Some quick facts:
- Balloteer will email ONLY the people in the Voters list which ANA provides them. The 4000+.
- Voting is secret meaning ANA cannot know who voted for which candidate.
- This company will send a report to ANA Election Committee which will include info like which candidate received how many votes, % of votes etc.
- This company is owned by http://www.telusys.net/ and is not owned by a NEPALI. This company is in the business of providing online voting as a service for a fee.
- If you are a good hacker and decide to get into their system, their Sys Admin would surely find out and then their lawyer will drag you to the court.
- To use those emails, you would have to first guess the correct email address and then know the password. How else would you click on that secure https link sent by Balloteer and VOTE?


“Does it mean the election is not valid at all ? Can I make a candidate win or lose. Can I use Dhirengurung11--@yahoo.com and vote on his behalf?? I won't do those things but can be done right?”
Answer: This will depend on whether you can hack into Dhiren Gurung's email acct. How are you going to guess the password? BTW, you already know this .. hacking into someone's email acct is illegal and you can get prosecuted.