Hello, I am a professional linux ops. I have to be honest with you, I don't have experience in deploying MTAs due to their specificity, however, I have deployed a lot of services including LNMP, GNU Health HIMS, Odoo ERP, EspoCRM and several others, so if you are willing to trust me, I am willing to take the time to test this deployment, if you need anything, please contact me, thank you!
Chunhui Ouyang