This is a suggestion for my batchmates at ISB.
If you're trying to email the ISB folks, please use the new email address that has been listed on the new admits' micro-site. It is meant to be used for queries by the new batch, and I suspect one gets a prompt reply if one contacts ISB on that. I'm sure ISB usually gets flooded on the other email addresses, which is why they've set up this new mailbox for queries from incoming students.
Secondly, the hyperlink on that email address is incorrect. Do not click on the link to email them. Instead, copy the text of the email address and use it.
I'm not listing that email address here on my blog, for obvious reasons. I would appreciate it if no one posts that in the comments either.