Zimbra MTA relay

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October 11, 2021 by aubreykloppers

To enable Zimbra to relay messages from another host:

First get your currect config with:

#) zmprov gs mymail.HOST.co.za zimbraMtaMyNetworks

Get the listing (i.e. 127.0.0.0/8), then add it with:

#) zmprov ms mymail.biblesociety.co.za zimbraMtaMyNetworks ‘127.0.0.0/8 41.1.1.1/32’

And then reload it with:

#) postfix reload


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
    1. zmprov gs zimbra.example.com zimbraMtaMyNetworks
  2. Then append desired additional network to above output and set new MyNetworks using:
    1. 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:
    1. postfix reload

sic: https://www.sbarjatiya.com/notes_wiki/index.php/CentOS_7.x_Zimbra_MTA_configuration

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