As of SpamAssassin 4.0 whitelist was renamed to welcomelist. The legacy options are named use_auto_whitelist, auto_whitelist_factor, auto_whitelist_ipv4_mask_len and auto_whitelist_ipv6_mask_len.
The AWL (Auto-Welcomelist) plugin tracks the long-term average score for each sender and then shifts the score of new messages toward that long-term average. This can increase or decrease the score for messages, depending on the long-term behavior of the particular correspondent.
Use auto welcomelist - use_auto_welcomelist
Whether to use auto-welcomelists. Auto-welcomelists track the long-term average score for each sender and then shift
the score of new messages toward that long-term average. This can increase or decrease the score for messages,
depending on the long-term behavior of the particular correspondent.
Default: 0
Auto welcomelist factor - auto_welcomelist_factor
How much towards the long-term mean for the sender to regress a message. Basically, the algorithm is to track the
long-term mean score of messages for the sender (mean), and then once we have otherwise fully calculated the score for
this message (score), we calculate the final score for the message as: finalscore = score + (mean - score) * factor.
Default: 0.5
Auto welcomelist IPv4 mask length - auto_welcomelist_ipv4_mask_len
The AWL database keeps only the specified number of most-significant bits of an IPv4 address in its fields, so that
different individual IP addresses within a subnet belonging to the same owner are managed under a single database
record. As we have no information available on the allocated address ranges of senders, this CIDR mask length is only
an approximation. The default is 16 bits, corresponding to a former class B. Increase the number if a finer
granularity is desired, e.g. to 24 (class C) or 32. A value 0 is allowed but is not particularly useful, as it would
treat the whole internet as a single organization. The number need not be a multiple of 8, any split is allowed.
Default: 16
Auto welcomelist IPv6 mask length - auto_welcomelist_ipv6_mask_len
The AWL database keeps only the specified number of most-significant bits of an IPv6 address in its fields, so that
different individual IP addresses within a subnet belonging to the same owner are managed under a single database
record. As we have no information available on the allocated address ranges of senders, this CIDR mask length is only
an approximation. The default is 48 bits, corresponding to an address range commonly allocated to individual
(smaller) organizations. Increase the number for a finer granularity, e.g. to 64 or 96 or 128, or decrease for wider
ranges, e.g. 32. A value 0 is allowed but is not particularly useful, as it would treat the whole internet as a
single organization. The number need not be a multiple of 4, any split is allowed.
Default: 48