How can I enable an e-mail account again?

I started to test Zoho VO like three days ago. The first e-mail that I configured was from Gmail (Google). I tested it and I could use it to receive a send e-mail. Later I added other e-mail test it and no problem. To avoid continue receiving e-mail form Gmail I disabled the account.

After that I tried to enable that e-mail again without progress, I delete the account, did a logout, login again, added the Gmail account again but is not enable.

What could I do?

Jose