Sure if you want a lot of them to go through but not necessarily all.
If someone marks your email as spam you may have to start all over again. If you want to send more than a few emails per day you have to warm the ip by sending specific volumes over time. It's doable, easier with a service to help you.
I guess it depends what kind of mail you're sending? I send & receive a lot of mail, but I can't imagine anyone has ever marked a mail from me as spam (except perhaps by clicking the wrong button), since it's just normal conversational personal & business mail. I never did any kind of deliberate 'warming up', I just set up the server and then started sending mail. In the first few months people would occasionally see mail from me go to their spam folder, but that hasn't happened in many years.
