Create smtp mail server
Firstly by a domain in namecheap , and create droplet(VM) in digitalocean https://namecheap.com , https://digitalocean.com Instructions: https://www.youtube.com/watch?v=Az8PHq-ZqhU https://inguide.in/build-postal-smtp-server-send-bulk-emails-ubuntu-18-04/ https://inguide.in/simplest-way-to-configure-postal-create-smtp-install-ssl/ Pls make attention for step by step instruction netstat -nlptu | egrep -i postal - print smtp port