I just want to say Muchas Gracias. in my firts write to zimbra team and and members.
Sorry by my poor english.
I successfull upgrade Zimbra from 4.5.3 to 4.5.6 on Centos 4, and my problems like (reply not working, no access with iexplorer) disappeared. all of them with only one step. Gracias, muchas gracias.
Rosendo Guzman Nogueda