here is my little story (background) : I am a user a Zimbra since the v5, and my current server is on the latest v6. Because of old hardware, I didn't upgrade, but everything worked really well.
Now that I have invested in a new server, I tried v8 (8.0.4_GA_5737.FOSS) as a fresh new install (no upgrade).
As I have 2 domains, the old server is on 1 domain, and the new one on the second domain, I will do an alias later.
But now, here is the problem : within the last 2 days, it seems that spammers have found the new server, and I was stuck with a mail queue of 350000+ mails.
After searching a little, it seems that auth on smtp was not mandatory (tested on MX Lookup Tool - Check your DNS MX Records online - MxToolbox on both servers, old one is good, new one is said to be an open relay).
This was my network setting :
zmprov gas -v | grep MyNetwork
-> zimbraMtaMyNetworks: 127.0.0.0/8 192.168.0.0/24 [somes ipv6 settings was here too]
to make stop the mess, now it is setup like that :
zimbraMtaMyNetworks: 127.0.0.0/8 192.168.0.2/24
The problem is that now, I can't send email throught the new server from everywhere.
The auth settings are setup like that :
zmprov getServer xxxxx.me | grep Auth
I have a question : is it normal that zimbraMtaSaslAuthEnable changed from TRUE / FALSE setting to yes / no ??
I don't really know why the new server don't enforce the use of auth on smtp, but it is a big problem for me, as now my ip is banned.
Can someone please help me.