[IMail Forum] Please help: So strange case, imail holds old IP for a host.

[Jobs Zhao]

Dear all,   We install ICS 2.0 in a Windows server 2003 DC with DNS service, the DC’s IP is 172.29.0.1 The primary DNS is itself, 172.29.0.1.   We established several VPN tunnels with other sites in different countries, in DNS service we Created corresponding zones for these sites, including MX etc.   Every site has its own mail server.   For Site A, its IP is 172.28.0.1; imail uses this IP to send email, and works fine.   Recently Site A changed the IP 172.28.0.2, we made adjustments in our DNS and restarted server. When I checked imail log and found it used previous IP not the changed on.   I restarted DNS and ran the command ipconfig /flushdns, also clear the DNS cahce of Queue manager Of imail, the problem remains as before?   Is there is other settings about this?   Thanks in advance.   BR/Jobs