I am a graduate student. Some part of my master thesis requires me to contact a professor from another university. In the first email I addressed him as "Dear Professor Smith". He started his reply with, let's say, "Dear Emily".
Does it mean that he also asked me to call him by his first name? He didn't do it explicitly. How should I address him in my next email?
We are going to meet face to face in the foreseeable future. He doesn't teach me.
My question isn't about addressing a professor in the US. All I want to know is how to be polite if we communicate in Enlish (although this is a mother tongue neither for him nor for me), so my inquiry refers to the English language, not the (English or American) culture.
In other words: did the professor suggest that I we should be on first name basis by addressing me as "Dear Emily" in his email?
The email was sent to me and other members of my group. It started with "Dear Emily and all" and ended with "Cheers, John". The professor is on first name basis with the rest of the group.
Edit: My question is about this particular situation, the email I received (not a general rule), so I don't think this is a duplicate.