Some suggestions/issues I've encountered during setup

[adam.sage]

I recently set up proxmox to replace Scrollout and so far I'm pretty happy with it.

There are a few things that I wish we could do:
Set the spam preview to default to raw mode instead of html. I looked all over and could not find how to achieve this, is there a config somewhere to do this?
Sign outgoing DKIM messages. I have this manually configured for now but would be nice to do this through the web interface.
Manage certificate for web interface and smtp through the web interface. Same as above, I've manually set this up for now.

Here are some issues I ran in to:
LDAPS for User management is broken, is there any update on that? https://forum.proxmox.com/threads/ldap-ssl-failure-server-name-mismatch.46817/
Verify Receivers doesn't seem to work. All emails still get relayed to my exchange server which then sends an NDR.
The console shows "Disconnecting... (Detecting migration...)" after a few seconds of activity but I do not have a cluster set up.

 

[tom]

Verify Receivers doesn't seem to work

Maybe your exchange does not answer as needed.

check the chapter "3.3.5 Receiver verification" on https://www.proxmox.com/en/downloads/item/proxmox-mail-gateway-deployment-guide
there are some hints for exchange config.

 

[adam.sage]

Thanks for the quick reply. That seems to have made things worse. With Verify Receivers turned off proxmox sends an internal NDR which does not get DKIM signed and fails DMARC. With Verify Receivers turned on it appears there is a double bounce internally and nothing gets sent to the original sender.

Feb 8 10:41:04 mg1 postfix/cleanup[2592]: 582C42212A6: message-id=<20190208154104.582C42212A6@mg.domain.com>
Feb 8 10:41:04 mg1 postfix/qmgr[2568]: 582C42212A6: from=<double-bounce@mg.domain.com>, size=269, nrcpt=1 (queue active)
Feb 8 10:41:09 mg1 postfix/smtp[2602]: 582C42212A6: to=<testing2@domain.com>, relay=10.0.8.91[10.0.8.91]:25, delay=5.1, delays=0/0/0.07/5, dsn=2.1.5, status=deliverable (250 2.1.5 Recipient OK)
Feb 8 10:41:09 mg1 postfix/qmgr[2568]: 582C42212A6: removed