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Well I do know the problem now. It's the Y22K Bug.. Source: https://www.onmsft.com/news/fix-for-microsoft-exchange-bug-now-available

Well for some reason it's using the self-signed certificate...

Hi Stoiko, I have a trusted certificate from Let's Encrypt installed on my internal Exchange Server... not sure why it's not working :(

Hi all, I have an issue receiving and sending emails. Setup: PMG ----> Exchange 2019 ----> Clients. I've taken a look at the logs and they say the have been delivered but the syslogs says Untrusted TLS connection established to (172.16.0.20) which is the Exchange server.

Sorry for the late reply. I got caught up with work. I am afraid I cannot provide any logs as I removed the server due to it not working anymore.

Couple of questions: 1. Have you created relay domains in the PMG admin portal? 2. In the Transport section have you added the domains in the PMG admin portal? 3. Have you created a receive connector that is pointing to your mail gateway? This is done in Exchange Admin Console

Hello all. I am trying to install LE certificate on my PMG VM and I tried this before following this guide https://forum.proxmox.com/threads/how-to-lets-encrypt-and-pmg.41493/ but it broke my PMG. The SMTP service stopped working, is there a new guide which I can use? Thanks

Syslog: Seems to be connecting to the server to verify.. From their website: Just enter the e-mail address and wait for the test results to appear. There you will see the results of the different checks that are performed: Syntax check If the format is incorrect it will be reported why...

Hello all, Our config as follows: incoming mail Internet ----> PMG cluster----> Exchange 2019 outgoing mail Exchange 2019 ---->PMG cluster ----> Internet We would like to have the ability to verify our emails I am using www.mailtester.com and I am currently getting this message, but I would...

Never mind I have found out the solution. It was to point the PMG IP as the relay and set it in relay.

Yes. How do I do it?

Yes. These are the settings still unable to verify emails..

Double check all valid email can come in as normal and non valid email is being blocked. how do I do that?

How do I do that? sorry, not good at this CLI Postfix...

Thank you! Working. Is there a way to verify emails? I am using www.mailtester.com to verify emails.

Hello all, Firstly, this is the first time I use PMG I am not good with Postfix or the CLI. I would like to change the postmaster email from using the "postmaster@hostname.domain.com" to "postmaster@domain.com" I tried to follow this guide but the commands did not work...