On Wed, 14 Aug 2019, Wietse Venema wrote: > Kadlecsik J?zsef: > > It seems it's a persistent problem. I tried to contact the postmaster at > > the other side but of course got the same reject. We'll try to contact > > them via a third party. > > In that case, try setting > > -o inet_protocols=ipv4 > > (or ipv6) and see if it is a specific kind of DNS that is borked.
The MX of the domain has got IPv4 address only, so IPv6 is not used. We have got such a special transport for sites with advertised IPv6 addresses but broken IPv6 connection... Best regards, Jozsef - E-mail : kad...@blackhole.kfki.hu, kadlecsik.joz...@wigner.mta.hu PGP key : http://www.kfki.hu/~kadlec/pgp_public_key.txt Address : Wigner Research Centre for Physics, Hungarian Academy of Sciences H-1525 Budapest 114, POB. 49, Hungary
