How to debug "Client host rejected: cannot find your hostname"

smtpd_sender_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unknown_sender_domain, reject_unknown_reverse_client_hostname, reject_unknown_client_hostname Thank you very much, -- Carles Pina i Estany https://carles.pina.cat

Re: How to debug "Client host rejected: cannot find your hostname"

cted: cannot find your reverse hostname" in this case. Thanks for any answers! (even if it's to make me check more things from a different point of view) -- Carles Pina i Estany https://carles.pina.cat

Re: How to debug "Client host rejected: cannot find your hostname"

Hi Wietse, On Mar/06/2022, Wietse Venema wrote: > Carles Pina i Estany: > > root@mail:~# nslookup 188.39.73.166 > > 166.73.39.XXX.in-addr.arpa name = mailcluster.zen.co.uk. > > That is sufficient to satisfy reject_unknown_reverse_client_hostname. > > B

Re: How to debug "Client host rejected: cannot find your hostname"

Hi, On Mar/06/2022, Wietse Venema wrote: > Carles Pina i Estany: > > > You can't use reject_unknown_client_hostname for that > > > site, if you want to receive their email. > > > > I think that it might be possible to white list a client? > >

Postfix: different configuration per different relay host

epending on the recipient of the email, not on the next relay host. Is it possible to do what I want to do? How? Because at the moment it seems impossible to me :-( Thank you very much! I really appreciate your help! -- Carles Pina i Estany Web: http://pinux.info || Blog: http://pintant.