Hi, I use DSPAM in server mode for some years now and relied on LMTP between Postfix/DSPAM/Cyrus to communicate with each other, so I didn't really look into the different modes of operation of the dspam binary itself; but recently it occurred to me that I was calling dspam in self-contained mode for retraining, whereas I could just call it as a thin client which would communicate with the already-running server instance.
So I have a question about the difference between dspam and dspamc
because the README isn't quite clear on this: it gives two contradicting
affirmations.
Between lines 1771 and 1784 we have:
> The DSPAM agent can then be called the same as if you were running in
> standard (non-client/server) mode and adding --client to the set of
> parameters. Running dspam without --client specified will cause DSPAM to
> revert to its normal non-daemon behavior and establish database connections
> on its own. The client settings will be loaded from dspam.conf, and the
> agent will act as a thin client instead. For example:
>
> dspam --client --user dick jane --deliver=innocent -d %u
>
> Alternatively, if you'd like to use a thinner client, dspamc is identical
> to the dspam binary in behavior, but has been stripped down to only include
> the lightweight client.
>
> dspamc --user dick jane --deliver=innocent -d %u
...which seems to imply that "dspamc" is equivalent to "dspam --client".
But later, between lines 1892 and 1895, we can read:
> "dspam" mode notes.
> In dspam mode, only the dspam client will be connecting to your LMTP server.
> This can be dspamc (a thin-client) or the dspam binary. In either case,
> you'll need to specify --client to tell DSPAM to act as a client. DLMTP
...which says that dspamc still needs the "--client" option.
The logic would dictate that the first affirmation is true, and the
second one is false; if that's the case, then the README should be
fixed, as well as dspamc man page (if it can work only as a thin client,
the man page shouldn't mention the --server option, and stress out that
the --client option is useless).
To be clear, in main.cf (Postfix), I had:
> dspam-retrain unix - n n - 10 pipe
> flags=Ru user=dspam argv=/usr/bin/dspam --user ${sender} --class=${nexthop}
> --source=error
If I replace /usr/bin/dspam with /usr/bin/dspamc, do I have to use the
--client option ? I don't think so, but could someone familiar with the
source code confirm ?
Thanks :)
--
Raphaël Halimi
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