Can non-established members start a conversation / PM?

Is there a certain threshold that a new member reaches long before he can communicate with another member through conversations?

The reason I ask is that I have asked people to send / initiate communications, but they do not. Simply respond with a message of type "I'm interested, send me an email." I realize that they are not "established" – few publications, I do not like, etc.

I read the anchored Frequently Asked Questions and did not see a restriction in the PM, only one response that updated how PM is now called Start a conversation.

Well, I wrote a lot of words here just to ask if noobs can start conversations. Thank you!