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As of SpamFilter ISP version 4.0.0.766, following is the updated order of the filters. In red are the blacklists, in green the whitelists:
Cached IP blacklist
Greylist
        Whitelisted IP
        Whitelisted Email Address To
        Whitelisted EMail Address From
        Whitelisted Email From Domain
        Whitelisted Auto White List Force Delivery
        Exceeded MaxMsgSizeForSpamFiltering        Keyword Whitelist
Allowed Domains
Local IP Blacklist
Local Domain Blacklist
Local Emails Blacklist
Local Emails TO Blacklist
Not in Authorized TO Emails
Country Blacklist
Reject No Reverse DNS
Reject Empty Mail From
Reject Same To From Email address
Reject if Recipient's email in Honeypot email list
Reject if IP in Honeypot-generated auto-ban list
Reject Same To From Domain
Recipient Count > Max RCPTTO
MX Record check
SFDB Filter
SPF Filter
MAPS check
SFDC Filter
Blank emails with attachments only
Spam Images in PDFs
Attachment Filter
Keywords
Image Filtering
Bayesian Filtering
SURBL check
Resolve URLs and check IPs in MAPS
Antivirus Plugin

Please note the availability of the following option in the SpamFilter.ini file to handle exceptions with the first two blacklists that take priority over the whitelists:

;Add any IPs (separated by commas - no wildcards) that you do not wish to be automatically added to the Honeypot IP blacklist. This setting also prevents those IPs to be added to the IP cache blacklist, and to allow them to bypass the greylist filter
DoNotAddIPToHoneypot=

Edited by LogSat - 12 March 2016 at 8:56am

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LogSat Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 25 January 2005 Location: United States Status: Offline Points: 4104	Topic: Filter Order - how filters are applied Posted: 31 July 2009 at 10:01am
	As of SpamFilter ISP version 4.0.0.766, following is the updated order of the filters. In red are the blacklists, in green the whitelists: Cached IP blacklist Greylist Whitelisted IP Whitelisted Email Address To Whitelisted EMail Address From Whitelisted Email From Domain Whitelisted Auto White List Force Delivery Exceeded MaxMsgSizeForSpamFiltering Keyword Whitelist Allowed Domains Local IP Blacklist Local Domain Blacklist Local Emails Blacklist Local Emails TO Blacklist Not in Authorized TO Emails Country Blacklist Reject No Reverse DNS Reject Empty Mail From Reject Same To From Email address Reject if Recipient's email in Honeypot email list Reject if IP in Honeypot-generated auto-ban list Reject Same To From Domain Recipient Count > Max RCPTTO MX Record check SFDB Filter SPF Filter MAPS check SFDC Filter Blank emails with attachments only Spam Images in PDFs Attachment Filter Keywords Image Filtering Bayesian Filtering SURBL check Resolve URLs and check IPs in MAPS Antivirus Plugin Please note the availability of the following option in the SpamFilter.ini file to handle exceptions with the first two blacklists that take priority over the whitelists: ;Add any IPs (separated by commas - no wildcards) that you do not wish to be automatically added to the Honeypot IP blacklist. This setting also prevents those IPs to be added to the IP cache blacklist, and to allow them to bypass the greylist filter DoNotAddIPToHoneypot= Edited by LogSat - 12 March 2016 at 8:56am
	Roberto Franceschetti LogSat Software Spam Filter ISP

LogSat Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 25 January 2005 Location: United States Status: Offline Points: 4104	Posted: 19 November 2009 at 4:52pm
	As of SpamFilter ISP version 4.1.2.819, following is the updated order of the filters. In red are the blacklists, in green the whitelists: Cached IP blacklist Greylist Whitelisted IP Whitelisted Email Address To Whitelisted EMail Address From Whitelisted Email From Domain Whitelisted Auto White List Force Delivery Exceeded MaxMsgSizeForSpamFiltering Keyword Whitelist Allowed Domains Not in Authorized TO Emails Local IP Blacklist Local Domain Blacklist Local Emails Blacklist Local Emails TO Blacklist Country Blacklist Reject No Reverse DNS Reject Empty Mail From Reject Same To From Email address Reject if Recipient's email in Honeypot email list Reject if IP in Honeypot-generated auto-ban list Reject Same To From Domain Recipient Count > Max RCPTTO MX Record check SFDB Filter SPF Filter MAPS check SFDC Filter Blank emails with attachments only Spam Images in PDFs Attachment Filter Keywords Image Filtering Bayesian Filtering SURBL check Resolve URLs and check IPs in MAPS Note - The Antivirus Plugin, if present, will stop any infected emails regardless of the whitelist settings Please note the availability of the following option in the SpamFilter.ini file to handle exceptions with the first two blacklists that take priority over the whitelists: ;Add any IPs (separated by commas - no wildcards) that you do not wish to be automatically added to the Honeypot IP blacklist. This setting also prevents those IPs to be added to the IP cache blacklist, and to allow them to bypass the greylist filter DoNotAddIPToHoneypot= Edited by LogSat - 02 December 2016 at 10:11am
	Roberto Franceschetti LogSat Software Spam Filter ISP

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Filter Order - how filters are applied