# Switch to Zimbra user su -u zimbra # Check Postfix postconf message_size_limit message_size_limit = 10240000 # Set postfix zmprov modifyConfig zimbraMtaMaxMessageSize 50000000 postfix reload #Set IMAP globally zmprov modifyConfig zimbraFileUploadMaxSize 50000000 # Set IMAP per domain zmprov modifyServer mail2.domain.com zimbraFileUploadMaxSize 50000000
Restart Zimbra after executing this