gmail dissapearing

[jcragg]

Ok, here is my problem, when using a windows mobile phone, I have trouble with gmail. The trouble is that I have it set to look every 15 mins for email, well overnight it looks and then the next time it looks it erases the email from the time before. There has to be a setting, every windows phone I have had does this. I do not want it to erase unread email. What do I need to do???????