Long story short:
A good colleague of mine (henceforth OC) from my previous company applied for a job in my current company. Manager showed me OC's CV and I told the manager that OC is good news. So they decided to go for a telephone interview with OC. After OC got the news and learned that I work there also, OC sends me an email wanting to come in contact with me (possibly for small talk? but I am not sure).
I am not sure if I should reply. I mean OC is a really good individual and I'd love to have him in the company, but I feel like I am in a difficult position. Should I tell my manager about OC's email? Should I talk to OC? Should I just do nothing? Did the manager tell OC that OC got my thumbs up? What if OC starts asking what are the interview questions? I just feel like not involving until the formal process is over.
What do you think I should do? I just want to be professional.