Postfix-mail-server

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About

Postfix is a hugely-popular Mail Transfer Agent (MTA) designed to determine routes and send emails. This cross-platform server is open-source, free, and suitable for installation on the majority of UNIX-like operating systems.

Numerous client and server programs make up Postfix: the latter tend to run in the backend, while user or administrator programs utilize the former. Postfix’s structure is modular: it comprises various small, independent executables. Different parameters, features, and options are available, too.

Another key aspect of Postfix is that it was created to overcome those drawbacks seen in Sendmail. A solid configuration keeps Postfix user data secure from leakage, abuse, and spam.

Postfix includes a cutting-edge queue manager capable of handling queues in a faster, smoother way. That’s why a number of administrators cite Postfix’s higher efficiency compared to Sendmail, even with high loads.

Here are the main advantages you can expect to find when you start using Postfix:

  • Includes highly-detailed documentation
  • Security was clearly a priority in Postfix’s design
  • Postfix offers impressive compatibility with Sendmail
  • High queuing operation is fundamental to Postfix’s functionality
  • Active development is part of the Postfix set-up
  • Easy configuration, according to parameters of configuration files

You can subscribe to this product from GCP Marketplace and launch an instance from the product’s image using the GCP compute service.

  1. Go to the VM instances page.
  2. Select your project and click Continue.
  3. Click the Create instance button.
  4. Specify a Name for your instance.
  5. Optionally, change the Zone for this instance.

Note: The list of zones is randomized within each region to encourage use across multiple zones.

  1. Select a Machine configuration for your instance.
  2. In the Boot disk section, click Change to configure your boot disk.

Create a boot disk no larger than 2 TB to account for the limitations of MBR partitions.

  1. Select the Custom Images tab.
  2. Select the image project from the dropdown.
  3. Choose the image you want and click the Select button.
  4. To permit HTTP or HTTPS traffic to the VM instance, select Allow HTTP traffic or Allow HTTPS traffic.

The GCP Console adds a network tag to your instance and creates the corresponding ingress firewall rule that allows all incoming traffic on tcp:80 (HTTP) or tcp:443 (HTTPS). The network tag associates the firewall rule with the instance. For more information, see Firewall Rules Overview in the Virtual Private Cloud documentation.

  1. To add secondary non-boot disks to your VM instance:
    1. Click Management, security, disks, networking, sole tenancy.
    2. Select the Disks tab.
    3. Under Additional disks click Add new disk.
    4. Specify a disk Name, Type, Source type, Mode, and Deletion rule.
    5. Click Done.
    6. Add additional disks as needed.
  2. Click the Create button to create and start the instance.

Usage / Deployment Instructions

Step 1: Access the Postfix in Google Marketplace and click the LAUNCH ON COMPUTE ENGINE button.

Step 2: In the Configure & Deploy window, enter or select appropriate values for zone, machine type, and so on. Click the Deploy button

Ssh into vm:

Reconfigure Postfix:

$   sudo dpkg-reconfigure postfix

  1. In the configuration wizard:
    • Select Internet Site (for most common setups)
    • Enter your system’s mail name (e.g., your domain name like example.com)
    • For other options, you can typically accept defaults unless you have specific needs

After reconfiguration, restart Postfix:

sudo systemctl restart postfix

Check the status:

sudo systemctl status postfix

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    Highlights

    • icon

      Includes highly-detailed documentation

    • icon

      Security was clearly a priority in Postfix’s design

    • icon

      Easy configuration, according to parameters of configuration files

    • icon

      High queuing operation is fundamental to Postfix’s functionality

    Application Installed

    • icon Linux