邮件备份会很久,无需为此而发愁. 公司资源不要用, 包括电话和电邮.

During job hunting:
Don't leave office phone;
Don't use office email;
Don't tell current company name unless it is necessary;
Don't use current boss as reference;
Don't use people in current company as reference;
Don't say you are going to a interview when you ask time off;
Don't quit current before you get a solid offer in hand.

Thanks!