If you get message “timed out while sending message body” on queue, please try to decrease MTU value on network interface. Default value of MTU are 1500. You can decrease into 1460 or below. # Change MTU value temporary Assuming your network interface are eth0 ifconfig eth0 mtu 1460 Please try requeue your email and ..
By default, Distribution list in Zimbra can be sent from anywhere (internal domain and external domain). if you want to restrict from some users or internal domain only, please try this guidance # Enable Milter You must enable milter. Login to Zimbra Admin | Configure | Global Settings | MTA. Please checklist on Enable milter server. Next, restart milter ..