Class DeterministicSpamClassifier

Namespace

MailFathom.Application.Spam.Signals

Assembly

MailFathom.Application.dll

Reaches a verdict from what a message already carried, with no scanner, no network, and no model.

public sealed class DeterministicSpamClassifier

Inheritance

object

DeterministicSpamClassifier

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Remarks

This is the whole of the working feature without a sidecar deployed. Mail that reaches an IMAP mailbox has usually been scored already: the receiving server recorded SPF, DKIM, and DMARC outcomes in Authentication-Results, ARC preserved them across the forwarding hops where the first two legitimately break, the provider wrote its own verdict into an X-Spam-* header, and where it decided the message was junk it filed it in the folder it advertises for that. Every one of those is a fact from the moment it mattered, with network context nothing after delivery has.

What decides the verdict is deliberately narrower than what is recorded. A provider's own verdict decides, and a junk-folder placement outranks it because that is a decision somebody already acted on. An authentication failure does not: a DMARC failure is something the receiving server saw and chose to deliver anyway, and turning it into a spam verdict here would file mail the operator's own provider decided to accept. It is recorded as its own signal so a reader can see it, which is what the record is for.

Methods

Read(SpamHeaderFacts, MailFolderAlias, bool)

Reads a verdict out of one message's headers and where the mailbox filed it.