[Mailman-Users] Unable to send emails with mailman/postfix

[Mark Sapiro]

On 03/06/2017 01:01 PM, Scott Jones wrote:
> 
> Just as a recap, I'm currently running mailman on a Ubuntu VM hosted on a
> Ubuntu server. Perhaps then I need to forward port 25 to the VM somehow? I
> did have this working fine from hard disks, but with some server troubles
> we wanted to keep mailman more self-contained.


Yes. That is your issue. You need port 25 connects to the host server to
forward to Postfix on the Mailman VM. If your VM has its own IP address
and DNS, this isn't an issue, but if DNS for the MX points to the host
server, it needs to forward that port to the VM.

-- 
Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan