Get as far as storing an incoming mail in crockery.db

internal/smtp/mta.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"log"
+	"net/mail"
 	"sync/atomic"
 
 	"github.com/emersion/go-smtp"
@@ -74,6 +75,30 @@ func (m *mta) AnonymousLogin() (smtp.User, error) {
 // User implementation for go-smtp after this point
 // Since only anonymous login is permitted, there's no need to introduce an
 // intermediary to track the logged-in user.
+//
+// TODO: wildcard address support. For now, just dump everything directly
+// into a single hardcoded mailbox per-account
 func (m *mta) ServeSMTP(from string, to []string, r io.Reader) error {
-	return fmt.Errorf("Not yet implemented")
+	emails := make([]string, len(to))
+
+	for i, entry := range to {
+		addr, err := mail.ParseAddress(entry) // FIXME: should this be AddressList?
+		if err != nil {
+			return err
+		}
+		emails[i] = addr.Address
+	}
+
+	log.Printf("emails: %#v", emails)
+
+	recipients, err := m.store.FindAccounts(emails...)
+	if err != nil {
+		return err
+	}
+
+	if len(recipients) != len(to) {
+		return fmt.Errorf("At least one recipient is not known locally")
+	}
+
+	return m.store.SpoolMessage(recipients, r)
 }