CentOS 7.x Zimbra MTA configuration

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Configure Zimbra for relay for another servers

Note Configure -> MTA -> "MTA Trusted Networks:" will not work. This particular change *MUST* be done from command-line only.

To allow another servers emails via Zimbra (ie configure Zimbra server as relay for another server) use:

1. (As zimbra user) Check current whitelist setting for server

   zmprov gs zimbra.example.com zimbraMtaMyNetworks

2. Then append desired additional network to above output and set new MyNetworks using:

   zmprov ms zimbra.example.com zimbraMtaMyNetworks '127.0.0.0/8 10.10.130.0/24 10.10.200.25/32'

3. Reload postfix for new settings to take effect:

   postfix reload

Refer:

• https://wiki.zimbra.com/wiki/ZimbraMtaMyNetworks

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