Running 8.0.6 NE, and wanted to increase max message size a while back. If I changed it in the GUI, it didn't seem to actually do anything, so I ran the following command from the wiki:

root@ZCS:~# su - zimbra
zimbra@ZCS:~$ postconf message_size_limit
message_size_limit = 10240000
zimbra@ZCS:~$ zmprov modifyConfig zimbraMtaMaxMessageSize 102400000
zimbra@ZCS:~$ postfix reload
/postfix-script: refreshing the Postfix mail system
zimbra@ZCS:~$ postconf | grep messages_size_limit
zimbra@ZCS:~$ postconf | grep message_size_limit
message_size_limit = 102400000

That fixed the max message size, but it appears to have broken archiving. Any ideas how to fix archiving back would be appreciated - I have tried, unchecking it and checking it in the GUI with MTA restarts in between but it is still not working.