[Dovecot] dovecot & OCFS2 Cluster

Joseph Tam jtam.home at gmail.com
Wed Apr 27 01:50:21 EEST 2011

Robert Schetterer <robert at schetterer.org> writes:

>> Anyway, why use lmtp over lda ?
> i.e avoid backscatter by overquota

A clarification on this: backscatter (or rather, ambiguous NDR notices
that claim many users are over quota rather than just one) is a result
of a local mailer that support multiple recipient delivery in one
invocation, but can only return one result code to the MTA.

Since Dovecot's deliver-lda does not support  multiple recipient delivery,
this is not a problem.

LMTP can support multiple deliveries of the same message per invocation,
but replies with individual SMTP codes to avoid the above problem.
It can take advantage of this to efficiently implement single instance
storage if it is enabled.

> performance should better too

Apart from multiple deliveries or SIS, I'm not sure this is true, or
significant if it were.

Joseph Tam <jtam.home at gmail.com>

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