I’ve followed this guide https://www.digitalocean.com/community/tutorials/how-to-install-and-setup-postfix-on-ubuntu-14-04 step by step and tested sending my email from my gmail to both email@example.com and firstname.lastname@example.org. But the emails could not be delivered.
I have added
email@example.com felix in
sudo /etc/postfix/virtual step.
Could it be because I did not add any MX records?
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