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 50000000  postfix reload
Then restart zimbrazmcontrol restart