Property Value

Type: Boolean
true if the exception occurred after the server had already accepted the incoming connection from MailBee and returned the initial prompt; otherwise, false.

If the server accepted the incoming connection but not yet returned the initial response, it's considered the connection hasn't been established yet. Typical case when this can occur (the socket connected but the full connection procedure was not complete) is when an error occurs during SSL handshake which occurs right between socket connection and returning an initial response to the client.