https://news.ycombinator.com/from?site=analyticsindiamag.com
It's obviously the domain that's at issue, not you. And the reason the domain is apparently blacklisted is most likely because the mods judged a previously seen pattern of incredibly frequent submissions by a very small group of users to be spam. I mean, I'm just guessing as I'm not part of YC or anything, but based on past comments by the various principals here, and extrapolating a little bit, it seems pretty straightforward.
But if you really want to know, I'd say go with what the guidelines[1] say:
Please don't post on HN to ask or tell us something. Send it to hn@ycombinator.com.