Android clients do not synchronize incoming mail correctly. The other folders are synchronized, but the inbox is not. Only a few emails are downloaded, different clients (tablets, mobile phones) give different results, some emails on the phone and others on the tablet, a really strange thing. I have also used different apps (gmail, bluemail, etc.) always different results and only a few recent synchronized emails, on each device and app I set to download all the emails. If I synchronize with windows mail there are no problems.
What can it be? I read about someone with a similar problem who had mistaken the timezone configuration, mine seems correct.
Who can help me?