Why do legitimate mail messages have X-DCC header lines that say they are “bulk”, “many”, or spam?
There are several possible causes of such problems. The first and most obvious is that the mail is solicited bulk mail and that the source needs to be added to your whitelist. Another possible reason is that your individual legitimate mail messages have not been marked as spam because their Body or Fuz1 checksum counts are small, but that the IP address or other checksum counts are large. The IP address checksum count, for example, is the total of all reports of addressees for that checksum. That total is independent of the other checksums, and so counts all reports for all messages with that source IP address. A source of legitimate mail that has sent a message that was reported as spam by one of its recipients will often have the totals for the checksums of its IP address, From header, and other values be MANY. This is why it usually does not make sense to reject mail based on what the DCC server reports for the IP address, From header, and other values that are not unique to the mes
