So, I am researching master courses opportunities on a university at a different country (Scotland) and I was talking to the course director via email, asking about the workload of the course and he suggested I talk to a student, and gave me her email.
When the director gave the student email, he just said "Try emailing Jo", followed by her email.
However, it sounds a little awkward to approach that person with an email starting like "Hey Jo" or "Dear Jo", given that "Jo" sounds like some sort of nickname.
"Jo" is, however, all the information I have about that person.
It might also be rude to somehow imply that Jo might be an informal name and it turns out to be an actual name, given that I don't even know where she is from.
How can I start my email?