Dear all, After installing ISPConfig and using it for some time now, I get strange returned mail. The error is from my Postfix installation, and says: Host or domain name not found. Name service error for name=a_certain_domain.nl type=AAAA: Host found but no data record of requested type I already found it is a IPv6-thing, and it frequently happens when the receiving server is behind a router or something that doesn't really comply to the Rules of Ripe. My mail gets returned with this error when mailing companies (a few anyway). I can live with not being able to e-mail certain companies, but it's rather annoying. Is there anything at all I can do except hope everybody will wisen up and start using proper DNS-servers? Thanks.