RCPT: RE: detecting servers close connection

Return Receipt Notification --- Set your scocket in non blocking mode. Then your BIO_write will return always immediately and - if it return a value <=0 and - should_retry is false, you know that a critical error has occured like

RE: detecting servers close connection

Set your scocket in non blocking mode. Then your BIO_write will return always immediately and - if it return a value <=0 and - should_retry is false, you know that a critical error has occured like a closure of the connection. - should_