Problems with large E-mails

[LasseKongo]

Hello!
We have problem with Zimbra when recieving large messages (35MB+).

Global settnings / MTA / Max Message Size is set to 50000.

We are running Suse 10.0 32-bit on a machine with 1.5 GB ram, and Zimbra version 3.1.2_GA_445.suse10.
When running at the default setting we are able to recieve 30MB mails but not 35MB.

What happens is that Tomcat crashes with this output in zimbra.log.
--- snip

2006-06-22 09:51:43,002 FATAL [LmtpServer-2] [] system - Fatal error occurred while handling connection java.lang.OutOfMemoryError: Java heap space.

----snip
After reading another post on this forum we changed the Java heap size to 50% of total memory and was then able to get the 35MB mail through.

Also a single 50MB message was accepted, but not recieving 5 simultaneous 50MB messages, that craches Tomcat.
We also tried recieving 10000 10KB messages and that was no problem.
From looking at the logs it seems OK as long as the mail is handled by Postfix, but when postfix/lmtp tries to send the mail to Zimbra it leads to the above problem.
Anyone have a clue why this happens? Running out of memory with a ~450MB heap size and a 35MB mail seems strange.
/Daniel

[LasseKongo]

I should also have mentioned that we have managed to transfer a number of mailboxes to this server using imapsync. Some of the mails were close to 200MB in size and the were injected into Zimbra without problems.

So the problem seems to occur when the mail goes through postfix but not when copying directly with IMAP.
/Daniel

[14319KevinH]

We have had some similar issues reported with the PST import tool. Larger messages can cause out of memory exceptions. Can you please file this bug with the details you've posted here. Having anther concrete test case should help us get it solved quicker.