I have sent several mail to the renters in my house about power bills that will be divided by them.
All of them are lost. Some other mail to the renters are also lost.

Very strange if this was caused by someone hacking or using my email account.
They then deleted all of the mails concerning powerconsumption and partially other mails. Not in a specific timeperiode or seems to specific contacts..

I have also followed the login logs and it does not seem like someone else have logged into my account. A strange thing, or is it? My android phone uses my 3G network with another ip-adress, this does not show up in my logon history. Is it because i am using a gmail app?

Anybody else had this issue?
If i delete a contact group this should not happen, right?
Also seems to be a problem with the contact sync between Android and Gmail, If i delete duplicate contact and move contacts in gmail, some contacts gets lost.
Search function in gmail is not good either, i sometimes have to write the whole search word to get any result at all..