ZCS Administrator Guide 7.2.1
ZCS Administrator Guide 7.2.1
Open Source Edition

Zimbra Mailbox Server > Incoming Mail Routing

Incoming Mail Routing
The MTA server receives mail via SMTP and routes each mail message to the appropriate Zimbra mailbox server using LMTP. As each mail message arrives, the Zimbra server schedules a thread to have Lucene index it.
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