On Mon, 2 Sep 2024 07:44:52 +1000 (AEST) Raif Naffah via Users <users at lists.claws-mail.org> wrote: > > On 01/09/2024 19:33 AEST Marco Moock <mm at dorfdsl.de> wrote: > > ... > > > > Do you have NAT or firewalls? > > i have firewalld 2.1.3 [1]. my router probably has something > similar. Enable logging and check for any denied packets.