My site was ranking very well for a good keyword on msn.But since a couple of weeks , i do not see it anymore on MSN , it has been removed completely . The site was a neat site , not a spam one . I do not understand this at all , what could have happened?
There are several reasons why this can happen which you may have already considered. If you do excessive reciprocal linking with irrelevant sites, over-optimize a page on your site or someone might have done some black hat tricks to get you booted out of msn by exploiting some bugs in msn. These are just some possibilities. It seems they are getting better at detecting unnatural linking patterns so flags may be raised in this case and humans may check out the site for signs of attempts to artificially boost your site's rankings. Earlier I sent an email to the webspam team and they got back within about a month. We removed all the reciprocal links and got back in the index a few months later without doing a reinclusion request.
check this thread, you might have been a victim of this bug: http://forums.digitalpoint.com/showthread.php?t=188579
One of my sites also got banned from MSN. They appear to be unable to stop people SEO'ing their way to the top of the serps so the only solution is to ban any top ranking sites that are not owned by large companies. email to sort it out.
The problem is that MSN can't stop SEO's getting to number 1 on really top terms. The only thing they can do is ban you. I have had sites banned for being number one for top terms like "auto insurance" using purely white hat SEO. The only reason for a ban would be because that was the only way they could remove the site from the top. The sites have no adsense on them and don't use any dubious tactics except few paid links on relevant sites.
They are banning them because the sites make money selling advertising and with affiliate links. The sites are all full of hundreds of pages of useful content and are really great sites but MSN still bans them.
It can take a couple of months for them to get back to you. Doesn't everybody do this? It seems hard to believe unless you had a lot of uncloaked affiliate links proportionate to the content. I have been #1 in msn for quite a while for 'mlm affiliate programs' and it's full of advertising and affiliate links although it's not affiliate links on a search term about auto insurance. Did you have a tonne of affiliate links?
Have you gotten a resonse from webspam yet? That really sucks because they are letting a lot of spam into their SERPs and have bugs that allow black hat techniques to work which are much more serious issues.
I though MSN got their shit together until this last update that absolutely ruined their index and has flooded it with SPAM.