Hi
I am using postfix+courier-imap+ldap+squireelmail in RHEL AS updated kernel.This was an new installation production is fine but mail services gets hanged bettwen 3 HRS from Morning 6 to 14 Hrs in this time it will get hang 3 times , after that till next day morning it works fine .
I have checked MailLog i didnt find any error on that time,On the hang time i restart the following services and checked but mail flow is stopped
/etc/ini.d/postfix restart
/etc/.../courier-imap restart
/etc/.../ldap restart

But if i restart the server it works fine ..
My server HP,4Gb Ram,100Mbps.

Help out me to solve the problem....

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