There is a PhD position at a university. I have sent an email and also a follow-up email (after one week from my first email) to the corresponding professor and I haven't got any reply yet (it has been 4 days from the follow up email!).
somewhere at the personal webpage of the professor it is stated that to apply or if you are interested to postdoc please first email your CV to Prof. X. On the other hand, the "Apply online" button in the open position list is active. What should I do now? send another email to the professor?