General Scan Options
If sender fails DNSBL service "A" add xx points: Adds the specified number of penalty points to the total message scan score.
If sender fails DNSBL service "B" add xx points: Adds the specified number of penalty points to the total message scan score.
If sender fails MXRate lookup add xx percent of the MXRate score: If the sender fails the MXRate lookup, MXRate returns a probability score between 50% and 100%. This is converted to a penalty of 50 to 100. You probably do not want to apply that high a penalty for message scan purposes, so this feature allows you to apply a penalty as a percentage of the total MXRate penalty. For example, if MXRate retuned a 90% probability result, and this setting was set to 30 percent, the resulting penalty added would be 27 points ( 90 * .30 ).
If sender is an MXRate "Good Sender" deduct xx points: Deducts the specified number of penalty points from the total message scan score if the sender is listes as a "Good Sender".
If sender is from a suspicious country add xx points:. Adds the specified number of penalty points to the total message scan score. A suspicious country is any country defined in the MXRate Country Selection area.
If sender has no REVDNS entry add xx points: Adds the specified number of penalty points to the total message scan score if the sender has no Reverse DNS entry (REVDNS).
Block if message has file attachments containing the following (regular expression): You may define the type of files you do not want to accept as email attachments. This mask must be specified as a regular expression and it can be as simple or as complicated as you like. An example is given in the program.
Refuse message if total scanning score is xx points or greater and fails xx or more scanning tests: This options defines your threshold score for refusing a message. It also allows you to specify how many test must fail in order for the message to be refused when it exceeds the specified score.
Generate random bogus 550 error responses when refusing messages: Normally Alligate will issue a 550 Refused response then a message is blocked. Some users would prefer not to give spammers a clue what antispam software they're using and would rather return an response that the spammer could never figure out. If you select this option any one of several hundred bogus error responses will be sent back to the sender if they are rejected because of the message scanning functions.