How to enable Incoming mail to postfix on port 587?

[Colin Law]

On Tue, 9 Nov 2021 at 16:56, David Fletcher <dave at thefletchers.net> wrote:
> ...
> Zen Internet had
> sent me a router a few days beforehand, something called a Fritzbox. So
> far as setting up port forwards is concerned it is unfortunately no
> better than the Virgin hub 4.

You shouldn't have any difficulty setting up port forwarding on a
Fritzbox.  What model is it?

Colin