In my zimbra 7.1.1 OpenSource edition on Ubuntu 10.04 server, we have 500 users who mostly send mail to our internal users and some of our users will send mail to other domains. Yesterday I received the daily mail admin report that the total transaction was 18GB.
The actual words in that mail was,
5082m bytes received
13953m bytes delivered
We had restricted our mail attachment size as 6MB for every user. As per our calculation the total sent and received mails should not go beyond 2 GB.
But I am surpurised that by seeing 18GB. Is that real or there any problem in our mail server.