#Dovecot dsync backup examples how to

Usually the doveadm command is being run from the source and towards the target host, but in my case I reverse it because my home lab is not accessible from the Internet. We are now ready to do the actual backup of Dovecot using the doveadm backup command.

Both the mailboxes will end up looking identical after the synchronization is finished. It merges all changes without losing anything. You can also use doveadm sync to performs two-way synchronization. If there are any changes in the destination they will be deleted, so the destination will look exactly like the source. doveadm backup performs one-way synchronization. The doveadm command is versatile and can be used to perform many tasks, but I am planning it to solve my Dovecot Maildir backup needs. This was made possible by the ProxyJump directive in. To verify that our SSH connection is working we start a SSH session fro host A with the command $ ssh host-CДЄnd if everything is working as expected you are now logged into the mail server over SSH. Config of SSH-keys is not being described here. To allow my home lab server (host-A) access the Bastion host (host-B) over SSH I have created a custom. ssh/config file with the needed configuration to allow doveadm access the Dovecot server without any problems. To make this as simple and automated as possible I have modified my. SSH access directly to the mail server is not allowed, but you can access it by SSH jumping through the Bastion host. The Dovecot mail server on the Internet is placed behind a reverse proxy (HAproxy) in a secure manner and is not accessible directly from the Internet. The home lab is behind NAT and a firewall and is not accessible from the Internet by choice.

I have installed Dovecot with a similar config as my Internet facing installation so that all email accounts can be backed up in a safe manner. The servers have been named host-A, host-B and host-C to better understand the configuration used. My particular config is based on Ubuntu 20.04 and Centos 8 in my home lab. The post is not based on any linux distribution and can be used without any modifications as long as you have access to bash.

#Dovecot dsync backup examples how to

su to the user that owns the mailbox so that the correct SpamAssassin database is trained, or run it as a superuser and specify the DB option to point to the correct Get the list of mailboxes, and then set the folder you want to train again.This is just a short post about how to do Dovecot Maildir backup using the command doveadm backup initiated from your home server that is not on the Internet, to your Internet facing mail server using SSH as a secure transport medium. any suggestions for improvements would be welcome! Unfortunately it is not very efficient because it calls sa-learn once per message. HereвЂ™s one way IвЂ™ve found to work around it and to extract messages and train the filter. SpamAssassinвЂ™s sa-learn tool works well if you have an mbox or Maildir folder for spam, but it does not support DovecotвЂ™s excellent though slightly less convenient mdbox database format. 0 notes & JTraining SpamAssassin when using Dovecot mdbox