Wrong default thresholds for antispam
Fresh install, antispam tresholds are those:
Spam threshold = 6.2
Deny message spam threshold= 6.9
Spam treshold is too high, probably too false-negative with this, the best is 5 (refs: http://taint.org/2008/02/29/155648a.html)
Deny message spam threshold is too low, could be dangerous especially on newly installed systems. My proposal is set to 10 at least, maybe 12 is better.
#2 Updated by Davide Principi over 6 years ago
On a production mail server we have
Maybe a lower default is good while Bayes filters are not effective. From Spamassassin wiki
The bayesian classifier can only score new messages if it already has 200 known spams and 200 known hams.
#5 Updated by Davide Principi over 6 years ago
- Status changed from ON_DEV to MODIFIED
- Assignee deleted (
- % Done changed from 30 to 60
On a fresh installation the new default values are:
To reset spam thresholds to their new default values:
# config setprop amavisd SpamTag2Level 5.0 SpamKillLevel 15.0 # signal-event nethserver-mail-filter-save
#8 Updated by Giacomo Sanchietti over 6 years ago
- Status changed from ON_QA to VERIFIED
- Assignee deleted (
- % Done changed from 70 to 90
Properties are correct after upgrade:
[root@localhost amavisd]# config delprop amavisd SpamKillLevel [root@localhost amavisd]# config delprop amavisd SpamTag2Level [root@localhost amavisd]# signal-event nethserver-mail-filter-update [root@localhost amavisd]# config show amavisd amavisd=service AdminNotificationStatus=disabled AvailableDecoders=mail,asc,uue,hqx,ync,F,Z,gz,bz2,lzo,rpm,cpio,tar,deb,zip,7z,rar,arj,arc,zoo,lha,doc,cab,tnef,exe BlockAttachmentClassList=Exec BlockAttachmentCustomList=doc,odt BlockAttachmentCustomStatus=disabled BlockAttachmentStatus=enabled EnabledDecoders=mail,asc,uue,hqx,ync,F,Z,gz,bz2,lzo,rpm,cpio,tar,deb,zip,7z,rar,arj,arc,zoo,lha,doc,cab,tnef,exe MaxProcesses=4 RecipientWhiteList= SenderBlackList= SenderWhiteList= SpamCheckStatus=enabled SpamDsnLevel=20 SpamKillLevel=15.0 SpamSubjectPrefixStatus=disabled SpamSubjectPrefixString=***SPAM*** SpamTag2Level=5.0 SpamTagLevel=2.0 TCPPorts= VirusCheckStatus=enabled status=enabled
Marking as VERIFIED.