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Wordpress is widely used and accounts for 35.6% of all websites according to W3Techs. It's no surprise either as it has a robust catalog of plugins, themes, and a huge community. In this How-To, we're going to go over installing Postfix and configuring it to be a send-only service for your WordPress install.
Please note, this guide assumes that you already have a working WordPress instance installed. If you haven't done this already, check out SkySilk's guide to installing Wordpress over at https://help.skysilk.com/support/solutions/articles/9000173246-how-to-install-wordpress-with-lamp-on-ubuntu
Further, this guide also assumes that you've already set an MX record for your domain pointing to your SkySilk IP address. You can use the following guide as a starting point https://help.skysilk.com/support/solutions/articles/9000140012-how-to-point-a-domain-name-to-a-linux-vps-using-skysilk
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The first thing we should do is update our system. This can be done by using
sudo apt-get update && apt-get upgrade
This will take some time to complete, so why not grab some coffee while you wait?
Once that completes, we're going to install Postfix which can be done with
sudo apt install postfix
The result will usually be one of two things. It will locate the package and ask you if you'd like to install it, or it will tell you that postfix is already at the newest version like the image below.
If Postfix begins installing, it will lead you to a configuration window. If you already have it installed, you can open this window by using
sudo dpkg-reconfigure postfix
We're going to pick Internet Site and press enter.
For the System Mail Name, we're going to use our website's domain ( yourdomain.com ).
Leave the Postmaster section blank and press Enter. If the 'Other destinations to accept mail for (blank for none):' is already populated, go ahead and empty that field and leave it blank. We're not going to be receiving mail with this setup, we're only going to be sending.
The rest of the configuration can be left as it's default option from here. If you have specific needs, you can configure them at this time.
For more information about the next steps, please refer to the official Postfix documentation at http://www.postfix.org/documentation.html
The next step will be updating the Postfix configuration file with this information:
mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = loopback-only
That's it! We're done. The last thing to do will be restarting Postfix to ensure the changes take.
sudo systemctl restart postfix
Test it out with a demo post and comment.
Join our Private Discord Chat to chat with, as well as find community assistance from other Verified SkySilk Users: https://invite.gg/SkySilk
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