I January, I saw 3 sites that I work for, disappeared from Google index.
After lots of hours of Research, IP scan, Pages Reviews and etc., I noticed that the only common point is those domains are hosted on a microsoft server with IIS 6.0.
Last week I found one of them back in GG since the Website was moved in a Apache hosting solutions. More, the site came back with is same old content - not with a fresh crawl from google.
This situation let me suspect that GG seems to have problem to parse the headers of IIS. Especially with the "Modification-Date" header.
So my question to all readers of webmasterword is :
- If Your site have recently disapear of GG, does that site is Host on Microsoft-IIS/6.0?
May Be I'm loose my time on that path and your.
Your Answer should let me see.
Thanks to all