I am evaluating zimbra for my organization. I have downloaded zimbra 4.5.4 opensource edition and already setup a split domain with zimbra as a secondary for some users.
I have problem with some mails that are not encode the message header at all and they are not using us-ascii charecter set. They use tis-620 charecter set. These mails are from our parent organization that still using old and standard-incompatible mail client which is not properly encoding the massage header. So the zimbra WebUI cannot display these text properly.
I think that zimbra try to convert this in to utf and result in un-readable charecter in WebUI. Is there a way to specify the default charset in case of the message header is not properly encoded or not encoded at all (in this case)? Or if I have to modify source code, could anyone point me out where in the source that I should look at? I have try setting LANG env to th_TH.TIS620 but still doesn't work..
I have attached one mail that has this problem.