How about the OS question? Do I need to keep the same OS? Or I can install CentOS 5.2?
Thanks.

current status: Release 5.0.4_GA_2101.RHEL4_20080321155827 CentOS4 FOSS edition running on CentOS 4.7 - 32bitsNow, I want to move to the latest version of Zimbra, on CentOS 5.2 - 64bits. I have checked the wiki, and there is a tutorial for network edition only. So, my questions are1. Do those steps ...

it always returns

Apr 22 02:34:12 server-name postfix/smtp[3920]: connect to gmail.com[64.233.161.83]: Connection timed out (port 25)

Apr 22 02:34:12 server-name postfix/smtp[3945]: connect to gmail.com[72.14.253.83]: Connection timed out (port 25)

Is there any idea to fix?

Thank you.

I am facing exactly this error. I could not send mail to gmail, even other email addresses are fine. My IP has rDNS and domain has SPF record already
Is there any idea to fix?

Thank you.

I am deploying dkfilter, and it asks for port changing in Javamail. Otherwise, the filter could not be signed to outgoing mail

Yes, I want to change port 25. Please advice
Thank you.

I can send mail to each email address without any trouble, but sending to distribution list, it returns error This is the mail system at host zimbra-server-name.I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.For further...

Any idea please?

Can you let me know how to change default javamail port please?
Thank you.

I have some deffered emails in system, and I want to check the content of those emails. Where I can take a look? I have visited to /opt/zimbra/data/postfix/spool/ but there is only recipient, not content.
Thank you.