I have tried to fix this problem over 20 hours, but not found the solution. Please help.
my Zimbra version is :
[zimbra@servername log]$ zmcontrol -v
Release 8.0.1_GA_5438.RHEL6_64_20121105164412 CentOS6_64 FOSS edition.
With same settings, when i send email from other email clients (Thunderbird for windows, iPhone, Zimbra Webmail), it's delivered fine.
but when i send from Outlook 2007. on the zimbra.log showed "status=sent (250 Ok, message accepted for delivery)" but email did not deliver to destination email inbox (or spam box).
Found that it was IDC issue.