How to enable Incoming mail to postfix on port 587?

[Bret Busby]

On 24/10/2021, David Fletcher <dave at thefletchers.net> wrote:
> Hello,
>
> I've been having troubles with the WiFi dropping out on my virgin
> superhub 2 for a while so phoned them to complain about it. They've
> sent out a hub 4 and a new TV box.
>
> Today I'm aiming to get the hub 4 configured like the old superhub 2
> before they send a technician here tomorrow. I've got it set to my
> network address and DHCP range then started trying to get the port
> forwards set up.
>
> I've been using port 25 incoming to my postfix server for years and
> it's always worked fine but the damned hub 4 puts up a message in red
> saying that port 25 and a bunch of others are "reserved". What???
>
> So far I've tried enabling port 587 and disabling port 25 on the
> superhub 2 and making the adjustments I've found by Google searching
> the problem to the master.cf file:-
> changing smtp towards the top to 587
> enabling the submission line
> enabling the smtps line
>
> So far cannot get it to work. Obviously I don't want to plug in the
> damned hub 2 until I have confidence that email will be working when I
> do!
>
> Any further suggestions please? I'm running Ubuntu Server 20.04.3 LTS
>
> Thanks everyone
>
> Dave
>

If you are running postfix, then it is in your interest to be
subscribed also to the postfix mailing list.

Because your message did not indicate in which country you are
located, whilst, to me, it appears that your virgin access is a heap
of <expletive>, perhaps, it may be time to try an alternative,
depending on the available alternatives for wherever you are located.

-- 
Bret Busby
Armadale
West Australia
(UTC+0800)
..............