Hello Christian, Thanks for your reply. I check on my working server and... There's this message : Dec 18 11:09:27 sd- postfix/smtp[3501]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c01::1b]:25: No route to host
It seem's that my 2nd server detects that ipv6 is not available and use ipv4. Is it wrong to disable ipv6 support by changing inet_protocols? inet_protocols = ipv4 -- View this message in context: http://postfix.1071664.n5.nabble.com/Timeout-30s-but-message-sent-tp73268p73270.html Sent from the Postfix Users mailing list archive at Nabble.com.