If you are using a "dot host" in your TLD you most certainly will be considered spam. Now I understand why you have Gmail problems. I have a number of TLDs I reject because they are known to be used by spammers. 

I never get listed as spam by Gmail. 

From: sami@ketola.io
Sent: October 26, 2020 3:22 AM
To: lists@lazygranch.com
Cc: build+dovecot@de-korte.org; dovecot@dovecot.org
Subject: Re: Looking for a guide to collect all e-mail from the ISP mail server



On 26. Oct 2020, at 11.36, lists <lists@lazygranch.com> wrote:

Actually the reverse pointer doesn't have to match. In fact this is impossible if you are setting up virtual accounts on one server for different domains. You just need to have a reverse pointer.

Most email servers look to seen if the reverse pointer has a "dyn" in it and blocks those.


Also your own email server is not behaving nicely:

<lists@lazygranch.com>: host lazygranch.com[198.199.119.111] said: 500 5.7.1
   <83-136-254-93.uk-lon1.upcloud.host[83.136.254.93]>: Client host rejected:
   eat a bag of dicks (in reply to RCPT TO command)

and for that reason I have blacklisted you from any help requests. You may do the same whatever you are telling me to do.

Sami