Zimbra 8 – Adjust max attachment size for email

This sets the maximum attachment size to 50 megabytes. Log into the shell account and type the following:

su zimbra
zmprov mcf zimbraMtaMaxMessageSize 50000000
zmprov mcf zimbraFileUploadMaxSize 50000000
zmprov mcf zimbraMailContentMaxSize 104857600
zmprov modifyConfig zimbraMtaMaxMessageSize 5048000
postfix reload

Then restart zimbra

zmcontrol restart