OK, from my perspective.
Our corporate policy is don’t do this. I set that. Here’s why.
1. People forwarding emails to personal accounts killed our email gateways twice when emails were getting passed backwards and forwards.
2. When someone sends an enterprise an email, they expect it to stay in the enterprise. Passing it unprotected into the public domain is not what they expect to happen. Imagine if it got out into the public domain and was traced back to you?
3. If your personal device is not protected via a managed solution, if it gets stolen (and your personal security is poor), now someone has access to sensitive information. And that’s your fault. Your company is liable and you are culpable. Guess who’s getting sacked….
4. There’s a reason that every single legal firm specialising in email litigation has gone out of business. Email over the internet is not secure.
5. Data protection does not apply outside the eu, and every large email provider hosts outside the eu. If you’re recieving emails containing DPA related information, you’re breaking the law.
6. Do you recieve data your company doesn’t want outside it’s boundary? Because most employees do. Oops.
Show some respect for your company policies. They’re often not the IT team being arses, they’re a result of a business driver being enforced by the IT team. If your company needs you to recieve emails at all times, they’ll provide you with a managed mobile device, if they don’t they won’t.
Hope this helps.