2012/6/21 Darac Marjal <mailingl...@darac.org.uk>: > On Thu, Jun 21, 2012 at 03:54:28PM +0800, Umarzuki Mochlis wrote:
> I think I would first start by checking the output of repeated calls to > "dig +short mx yourdomain.example.org". This should vary, with your > servers swapping positions each time. > > If you only get the same output each time, then it's down to the sending > MTA to pick an appropriate MX from the list. I assume both your MXs have > the same priority; in that case the sending SMTP should pick one at > random and, if that fails, try the other. Note here, that if you're > using round-robin AND same-priority MXs, both are picking the order at > random. thanks, i also need to know how I would be able to investigate the flow of emails. What I had tried so far: dig +short mx reveals that from outside, users would hit barracuda MTA first then barracuda would forward (or so i thought) to a MailScanner (barracuda's outbound smtp host setting) but how do I check that MailScanner (installed on top of centos 5) forwards emails to those 2 MTA+proxy servers? email system is working at the moment, fortunately. mail flow that i assumed from outside: user -> barracuda -> mailscanner -> second zimbra MTA+proxy server -> one of two mailbox servers (via its public name) thanks -- Regards, Umarzuki Mochlis http://debmal.my -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/CAHW9mbz2eSNmVwa=-hwx_d52ee-splb7xad7unrxru8v+jb...@mail.gmail.com