Make use of relay_recipient_maps

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michabbs

Active Member
May 5, 2020
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Is it possible to use Postfix'es relay_recipient_maps feature?
I would like to have a list of all existing mailboxes, so that PMG could immediately reject emails to unknown users. I currently use it on my backup mx and it works very well. I am now going to set up PMG and am a little bit surprised PMG does not support it. (Or does it?)
 
michabbs said:
I would like to have a list of all existing mailboxes, so that PMG could immediately reject emails to unknown users.
Click to expand...
PMG uses recipient verification for this feature - see http://www.postfix.org/ADDRESS_VERIFICATION_README.html
(it's configurable in GUI->Configuration->Mail Proxy->Options)

if you want to adapt the postfix config used in PMG you can do so as well - just use the config templateing system:
https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#pmgconfig_template_engine

I hope this helps!
 
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I created my /etc/pmg/templates/main.cf.in with extra 'relay_recipient_maps' setting and it works perfect. :)

Now I imagine how could I synchronize relay_recipients.db in cluster? I simply put it to /etc/pmg. No success... I tried also to save it to /etc/pmg/templates. Also nothing was copied to another node... :-(

Of course I could write my own script, but... PMG configs are already synced anyway, so... How to (ab)use this feature? :cool:
 
michabbs said:
Of course I could write my own script, but... PMG configs are already synced anyway, so... How to (ab)use this feature?
Click to expand...
in principle the complete contents of /etc/pmg/templates should be synchronized - however - '.db' files are explicitly exempted from this...
meaning - you can get the source to all nodes - but would need to run postmap manually/via cron/some other mechanism (inotify) whenever the file changes.

I hope this helps!
 
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