Just a followup. We successfully upgraded to M3. The upgrade process, as expected, removed the extra modifications we made for DSPAM. Nothing broke, but since the upgrade changed the config files, zimbra wasnt passing the email to dspam anymore.
But it seems that SpamAssassin that ships with Zimbra is doing a MUCH better job. It seems more accurate by itself that SA + DSPAM was on M2. So i'm dropping DSPAM until a need arises again.
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