On 28.07.2019 02:31, Brian Kantor via 44Net wrote:
Unfortunately, whenever a mail handler such as 'mailman' gets a new address, it loses all the good will and reputation it has previously earned in various spam filters, so some recipients may miss out on a few messages because of over-enthusiastic spam filtering.
It ended up marked as spam on my server
Cause: The host name specified in HELO does not match IP address.
You you should fix that.