I have a droplet that runs on Ubuntu 18.04 and i’m trying to send a few emails(2/day) to my own email accounts(Google and Yahoo). On this droplet i only have the IP up and running(no domain name) and i’m using PHPMailer.
The first email made it to Yahoo but since then no email survived(not even as SPAM).
Is there a problem with not having a domain name?
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