Postfix: Using Microsoft 365 as SMTP Relay

Postfix mail server is available in almost all Linux distributions. You can use it as a simple relay (smart host) to send email messages from your local network to user mailboxes and forward email queues to SMTP servers outside your organization. In this article, we’ll show you how to set up an SMTP relay for Microsoft 365 (Office 365, Exchange Online) with postfix on Linux (using Ubuntu/Debian as an example).

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Backing Up Docker Volumes

To automate docker partition backups, I recommend using Docker-volume-backup image (https://github.com/offen/docker-volume-backup). This lightweight image (about 15 MB) allows you to connect to any volume in docker and backup files to a local directory, S3-compatible storage (AWS S3, MimIO, Ceph, etc.), or send save it to a remote device via WebDAV or SSH.

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Install and Configure Zabbix Proxy on Linux

Zabbix proxy is one of the infrastructure components that allows you to collect monitoring data from multiple devices and send data to the Zabbix Server. Zabbix Proxy can be used to collect monitoring data from remote locations, from hosts behind a firewall, or to reduce the load on the central Zabbix Server in large environments.

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Getting Started with MySQL/MariaDB Initial Configuration

In this article, we have described the basic configuration settings that must be set when deploying a standalone server with MySQL or MariaDB. We’ll look at the initial configuration parameters that must be checked before starting the server.

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