Today morning I received a mail from
alert@onlinesbi.com stating that I need to log-in into my account in order to resolve some error occurred with my account.
This is a phishing attack.

The attachment has a link to log-in page.
The attachment looks like this.

The link takes you to a phishing site.
Observe that the site address is incorrect.
Correct site address is https://www.onlinesbi.com/
The site is connected to server with normal connection, not a secured connection.
There is no encryption symbol at bottom footer.
So, be careful. Do not open the links given in mail.