This is happening rarely in Gmail. Please make sure that you have backups of all your mails someplace to avoid any loss.
http://mail.google.c...py?answer=50208
http://www.techcrunch.com/2006/12/28/gmail...mail-deletions/
Ways to avoid loss
1. Forward all your incoming mails to another Backup ID (Easier way). So if something bad happens you always have your contents.
2. Gmail offers POP. So, you can enable it in your settings and download all your mails to your email client (thunderbird, outlook etc). This is more comfortable and i have been using this... Its the best.
3. If you want more options... IMAP is also available in gmail. You can go for that to have your contents safe.
You can use any of the above ways.... but make sure you have a backup is some way if thats your primary mail ID.
Also, do not keep your gmail always open in firefox as there are some proven issues related to this. If you are not using your account for long, sign it out. Upgrade your firefox often. Also do not close the browser directly. Always sign out.
And regarding having your contacts safe, export your contacts from time to time and have it safe in some place.
Happy stay in Gmail.














