The story is one VPS that I do not set to send email. So there is no valid SMTP or spells like SPF, DKIM, rDNS let alone DMARC. But strangely the email notification that comes from the VPS is always successfully sent to my inbox. Steady right? On one side of my other VPS fuss send – send electronic mail even though it is complete everything, this is without the need to be set up even smoothly.
My guess is because the IP reputation of the server is so good that it passes spam checking. Unfortunately this can not be duplicated in other VPS just like that, hockey factor because.
Because it’s obvious (maybe?) There is no tool that can be used by CMSnya (WordPress) in the VPS to send an email then clear this through PHP with the command mail (). And this tutorial aim to turn off its function. So the step is to edit php.ini and add the following code in it:
disabled_functions = mail
After that restart the web server (Nginx, Apache, and the like) and PHP.
For a while the above solution is enough, but I still monitor. From my feelings there may be other factors that cause it.
