After a year of running Zimbra with no problems we are unable to send and receive email.
Currently using Zimbra version 5.0.10_GA_2638.RHEL5_20081003052615 with Centos 5.1.
Currently zmcontrol status states that everything is running.
The error that we receive when attempting to send mail is:
could nost send message: mail.send_failure
msg: smtp server reported: null
data: [object Object]
We are currently unable to receive mail as well.
Please advise as where to turn, not sure exactly what to look at to resolve this problem. Thanks for any help you can provide!!!!