(This information does not apply if you are using corporate sync)
You have a couple of options with gmail and your corporate email. Gmail has a function called fetch. Fetch will retrieve your email from your work email account and forward it to your phone automatically (again, this is assuming that your work email is not tied to an exchange system). With fetch, you can respond to email sent to your phone and your email address will appear as if you sent it from your computer (your work email address will not be changed to
xxxx@gmail.com). Fetch performs this function depending on how active your work email account is, but not less than once an hour. The other option is to have your work email forwarded to your gmail account which will in turn push that email to your phone.