Amavisd + SpamAssassin not working? no mail header (X-Spam-*) inserted

Amavisd has below setting in its config file /etc/amavisd/amavisd.conf by default:

$sa_tag_level_deflt  = 2.0;

That means Amavisd will insert X-Spam-Flag and other X-Spam-* headers when email score >= 2.0. If you want Amavisd always insert these headers, please set it to a low score, for example:

$sa_tag_level_deflt  = -999;

Restarting Amavisd service is required after changed setting.

Amavisd's main config file is different on different Linux/BSD distributions:

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