How to install Proxmox Mail Gateway

 

Resources

OS : Debian 10 (Buster)
RAM : 4GB (Recmmend)
Hostname : pmg.test.lk (It is very Important to set host name before the installation begins)

STEP 01 - Setting up the installation environment

• First add the host name to "hosts" file.

root@pmg:~vim /etc/hosts

• Then configure the Package repositories. (Required repositories are available in the PMG documentation.

In PMG documentation there is another repository which is used for security updates. This security update related repository is available in the source file of Debian 10 by default.

If this repository is not available in your source file please add it too. Otherwise do not add it as it gives a warning regarding the duplicate repositories when you run the "apt update" command. 

• After configuring the Package repositories, you need to update the system.

root@pmg:~# apt update 

At this point you may get the below mentioned errors:

Error 01:
Err:6 http://download.proxmox.com/debian/pmg buster InRelease
The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7BF2812E8A6E88E0

Solution:

Add the key which is given in the error. You can use the below command to add the given key.

root@pmg:~# apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7BF2812E8A6E88E0

When you run the above command it may gives the below error too.  

Error 02:
E: gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for   this operation

Solution:    

Install the required packages.

root@pmg:~# apt install gnupg gnupg1 gnupg2     

After installing the above packages you can add the key without any issue.

Then run "apt update" command and it will be completed successfully.

• Once update completed then you need to do a Upgrade.

  root@pmg:~# apt upgrade 

  
  

 

 

STEP 02 - Install Proxmox Mail Gateway

• Now install the proxmox mail gateway.   

root@pmg:~# apt install proxmox-mailgateway

At this point you may get the below mentioned errors

Error 01:
hostname lookup 'pmg' failed - got local IP address ''
dpkg: error processing package pmg-api (--configure):
installed pmg-api package post-installation script subprocess returned error exit status 22
dpkg: dependency problems prevent configuration of proxmox-mailgateway:
proxmox-mailgateway depends on pmg-api; however:
Package pmg-api is not configured yet.

Error 02:
Errors were encountered while processing:
pmg-api
proxmox-mailgateway
E: Sub-process /usr/bin/dpkg returned an error code (1)

Solution: 

If you didn't add the host name to your hosts file before the installation you may get this error. So the solution is to add the IP and host name to the hosts file as mentioned in the STEP 01.

Error 03:

Solution: 

 

Error 04:

Solution:  

Install postfix

root@pmg:~# apt install proxmox-mailgateway

STEP 03 - Web Logging 

• Further configurations need to be done via the Proxmox web interface.