I have switched from one hosting company to another, maintaining the same domain (e.g. www.mydomain.com).
Two days after DNS transfer was completed successfully, there was a sudden 60-70% drop in Google organic search results.
My site has some 20-30 static content ASPX pages and some 1100 dynamic content ASPX pages. (all can be accessed either as HTTP or HTTPS if the user has already logged in).
I have browsed through 100 result pages and found that Google has indexed also
mail.mydomain.com as well as
I suspect the problem being too many (x25!) pages indexed.
But How can I determine the REAL problem ? Is it a "BAD" IP assigned to me by the new hosting company ? or duplicate content ? or DNS configuration issues?
Any help would be much appreciate !