Many thanks for your answer ! In fact I've already in the BIND configuration of zone-one.com:
"zone-one.com. A xx.xxx.xxx.xxx" "mx1.zone-one.com. A xx.xxx.xxx.xxx" "zone-one.com. MX 10 mx1.zone-one.com." "xx.xxx.xxx.xxx.zone-one.com. PTR zone-one.com." Same is true for zone-two.com with exactly the same related parameters ! Maybe it is wrong to have both of them ? -- View this message in context: http://postfix.1071664.n5.nabble.com/Two-domains-names-under-the-same-IP-how-to-handle-this-issue-tp66655p66664.html Sent from the Postfix Users mailing list archive at Nabble.com.