I have a problem on one of our mail server, Zimbra 7.1.0 on SLES 11 SP1 64 bit. It need a long time to processing message with attachment over 3 MB. If I look at the queue manager on Zimbra Admin, message stuck on Amavis content filter (port 10024).
I have 10 MB of max mta size setup. Attachment are pdf file.
Is there any solution to resolve the problem?
Searching over Google and found some suggestion regarding smtp_data timeout http://abechik.wordpress.com/tag/zimbra/.
How can I modify the following entry on postfix main.cf (assume that main.cf will automatically reload & created by Zimbra)
smtp_data_done_timeout = 600s
smtp_data_init_timeout = 120s
smtp_data_xfer_timeout = 600s