I am about a graduate from my university. Will it be OK to use my personal email if I am looking for faculty jobs/postdoc positions. Will it somehow give a negative impact on my application as compared to those who apply through any institution's link?
If you have an institutional email that will still be accessible for the foreseeable future, I would suggest using it. When I see applications for academic positions that use @hotmail.com or something, I sometimes (subconsciously perhaps) judge the application to be of lesser desirability.
This momentary judgement of the applicant's email address is quickly dismissed if the rest of the application is quality. If you are using a good @gmail.com email address or something similar, there is no shame in that. It should go without saying, but obviously do not apply for faculty positions with an email such as firstname.lastname@example.org (or whatever). Even an email like email@example.com should be avoided.
I would suggest creating a nice gmail address specific for just your applications.
Roger.M.Turley@gmail.com (assuming one's name was actually Roger M. Turley)
This will allow you to be professional in your presentation as well as funnel all necessary correspondence to a specific and single purpose email account.
No, there's no negative impact. In many universities your email account stops working after you leave, and you'll definitely want potential employers to have valid contact information. And everyone knows and understands this.
And your current university will be listed in your resume and application, and will be confirmed by other means than having an email address.
There is a third possibility here, which is also worth considering: establish a professional address that is linked to a professional society rather than your current institution.
While not all societies do this, some will offer you an address at their domain as one of your benefits of membership (IEEE and ACM are examples). If the professional societies in your field do this, it can be an easy way to have a long-term professional email address that is respectable and clearly indicates your professional affiliation without being tied to your current institution (e.g.,
Another way to show a distinct level of professionalism is to take the time to register your own domain. As this will be used for professional purposes, its name should reflect that usage.
With a bit of learning you can use the same domain to host a resume. This can all be done for under USD$20-30 per year so beware of unscrupulous services offing to do it for you for much more.
Any employer is likely to be (perhaps even subconsciously) impressed by