[Users] Disable IPv6

[Edward]

On Sat, 16 Jul 2022 12:11:14 +0000
Colin Leroy-Mira via Users <users at lists.claws-mail.org> wrote:

> > I am testing out other Linux OS' in virtual machines, which only
> > provides IPv4. One of the IMAP servers accessed, pretty much forces
> > an IPv6 connection and with Claws, it's been hit-or-miss. 99% of
> > the time, it's a miss and the Network Log always shows 'connection
> > refused'.
> >
> > In order to access the same IMAP server using Thunderbird, this
> > required going into its Preferences Editor and disabling IPv6.
>
> Easiest way is to do it on the OS level if there's no ipv6
> connectivity:
>
> echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
>
> add net.ipv6.conf.all.disable_ipv6 = 1 to /etc/sysctl.conf to make it
> stick across reboots.
>
> HTH,

Hi Colin,

Unfortunately, that did not work either. Still get connection refused.

Unless it *is* something in unstable/sid...this is very strange.

Debian stable: works
Debian testing/bookworm: works
Debian unstable/sid: connection refused