Mailchannels JUNK delivery infrastructure. Dreamhost and Mailchannels causing domain/email reputation issues

I am seeing more serious problems with email being rejected when i send email from my dreamhost domain to external servers as it is marked as SPAM.

This is the same problem as discussed about 1 year ago in this post Mails I send getting marked as spam

However, I have now enabled DMARC and I can see that the problem is ultimately caused by Mailchannels.

DMARC reports show all IPs and authentication reports of email being sent through Dreamhost, and thus effectively through Mailchannels as this is what Dreamhost uses as a delivery service.

The below IPs are all Mailchannels IPs all flagged as blacklisted

<source_ip>23.83.212.9</source_ip> flagged
<source_ip>23.83.212.22</source_ip> flagged
<source_ip>23.83.209.62</source_ip>
<source_ip>23.83.209.24</source_ip>
<source_ip>23.83.212.16</source_ip>
<source_ip>23.83.212.23</source_ip>
<source_ip>23.83.212.8</source_ip>
<source_ip>23.83.212.4</source_ip>
<source_ip>23.83.212.19</source_ip>
<source_ip>23.83.209.34</source_ip>
<source_ip>23.83.212.21</source_ip>
<source_ip>23.83.209.56</source_ip>
<source_ip>23.83.209.12</source_ip>
<source_ip>23.83.212.16</source_ip>
<source_ip>23.83.212.17</source_ip>
<source_ip>23.83.212.18</source_ip>
<source_ip>23.83.209.56</source_ip>
<source_ip>23.83.209.34</source_ip>
<source_ip>23.83.209.62</source_ip>
<source_ip>23.83.209.24</source_ip>
<source_ip>23.83.212.21</source_ip>
<source_ip>23.83.212.4</source_ip>
<source_ip>23.83.212.22</source_ip>
<source_ip>23.83.212.23</source_ip>

You can confirm this on mxtoolbox blacklisting lookup.

https://mxtoolbox.com/SuperTool.aspx?action=blacklist%3A23.83.212.4&run=toolpage#

Fact is that Mailchannels has its own pool of IPs and they use their own obscure SPAM checks to classify outgoing email. And if this is detected as SPAM they do not give you any clue but they just send it using a pool of DIRTY junk IPs as their support clarified to me.
Dreamhost tries to hide this by not even bothering checking these aspects. I had to enable DMARC and see the reports to verify that indeed the problem is in the Mailchannels IPs infrastructure.

This is causing amazing problems as in my case the email is not even just marked as SPAM on the recipient but indeed it is fully rejected and thus they never see it not even in the SPAM folder.

I have tried to flag this with Dreamhost and it does not look like they even know what is happening. Does anyone run part of their infrastructure on Dreamhost and had to move the email service to avoid getting classified as SPAM

It would be great if Dreamhost had a better service for this as at the moment even with authentication enabled everything is broken up to the point that I am considering moving also the webservers away even if I have like 7 years of paid hosting already.

Such a bad experience with this!