SMTP vps Configuration

I am looking for an experienced system administrator to help me configure an SMTP server. I have already identified the SMTP server as a vps windows server. I will provide specific security and authentication requirements as needed. The experience system administrator must have in-depth knowledge of setting up and configuring an SMTP vps server. They must be able to deliver the project on time and without any problems. I would prefer if they have experience with Postfix, Exim, and Sendmail, as this is the most preferred SMTP server. I am looking forward to working with an expert who can provide quality service.