Recently, one of our staff complained that she is not receiving emails. I had to look on user preference tab to see if unknowingly she enabled email forwarding.
From the preference tab no email forwarding was enabled. So i had to look via command line with grep option.
I came to find out all mails are being forwarded to yahoo email account without leaving a copy of sent email.
I asked her if she knows the address and she said NO.
Therefore, i had to investigate further. Then i came to find out through zimbra admin interface. On her account, email forwarding was enabled without leaving a copy.
Now the question is how come it's not shown on user preference tab?
I only saw it through admin interface.
Also, how can i list all address that have email forwading address?
I suspect someone else might be having the same problem without knowledge.