可是你给的link也说的不可以的。。。

whether the use is at work and on employer equipment. The employer should not look at private emails on a private email account that is password protected by the employee because the employee has a reasonable expectation of privacy, the account is the employee’s, and computer hacking laws provide protection against viewing personal emails without consent.

后面是对employee的忠告：However, employees should be careful about using those accounts and passwords on employer owned equipment, because that information can be stored in backups, is visible to monitoring software and may not really be private at all.

所有跟帖： 

• 不要吵了，如果用gmail，Google都能看的。他们总裁讲了，除了他和G的CEO，大家都没隐私。 -N.- ♀ (0 bytes) () 09/19/2014 postreply 17:00:44

• gmail不是铁板一块 -lexm5- ♂ (384 bytes) () 09/19/2014 postreply 19:35:51