Solved : Timed out while sending message body on Email Server

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Linux, Zimbra No Comments

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 check

# Change MTU value permanent

If using Ubuntu, please configure like example below

cat /etc/network/interfaces
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.11.11/24
gateway 192.168.11.1
dns-nameservers 192.168.11.11 192.168.11.1 8.8.8.8
dns-search imanudin.net
mtu 1460

If using CentOS/Redhat/Fedora

cat /etc/sysconfig/network-scripts/ifcfg-eth0
# eth0
DEVICE=eth0
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.11.11
NETMASK=255.255.255.0
GATEWAY=192.168.1
MTU="1460"

I don’t know what related about value of MTU and message “timed out while sending message body” on Queue. However, when i am decrease MTU value, my queue email gradually sent to recipient

Good luck and hopefully useful 🙂

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