September 28, 2008 by admin
Zimbra uses the LMTP protocol for inbound mailstore delivery. By default, Zimbra's Postfix MTA will use DNS for mailbox server host resolution. Use this tip to bypass DNS inbound delivery from the MTA to mailstore.
$ su - zimbra
Query the existing Postfix value
$ postconf lmtp_host_lookup
lmtp_host_lookup = dns
Edit /etc/hosts
10.1.1.1 mailstore.server.com
Modify main.cf
$ postconf -e lmtp_host_lookup=native
Update Zimbra's local configuration for upgrade persistence
zmlocalconfig -e postfix_lmtp_host_lookup=native
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