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in DSNs, add a References header pointing to the message with deliverability issues

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so mail user agents will show DSNs threaded/grouped with the original message.
we store the MessageID in the message queue, so we have the value within reach
when we need it.

i saw a references header in a DSN from gmail on a test account. makes sense to me.
This commit is contained in:
Mechiel Lukkien
2023-07-23 17:56:39 +02:00
parent c5747bd656
commit dcb0f0a82c
8 changed files with 50 additions and 27 deletions
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11
queue/dsn.go
View File

@ -101,11 +101,12 @@ func queueDSN(log *mlog.Log, m Msg, remoteMTA dsn.NameIP, secodeOpt, errmsg stri
}
dsnMsg := &dsn.Message{
SMTPUTF8: m.SMTPUTF8,
From: smtp.Path{Localpart: "postmaster", IPDomain: dns.IPDomain{Domain: mox.Conf.Static.HostnameDomain}},
To: m.Sender(),
Subject: subject,
TextBody: textBody,
SMTPUTF8: m.SMTPUTF8,
From: smtp.Path{Localpart: "postmaster", IPDomain: dns.IPDomain{Domain: mox.Conf.Static.HostnameDomain}},
To: m.Sender(),
Subject: subject,
References: m.MessageID,
TextBody: textBody,
ReportingMTA: mox.Conf.Static.HostnameDomain.ASCII,
ArrivalDate: m.Queued,

11
queue/queue.go
View File

@ -101,9 +101,10 @@ type Msg struct {
NextAttempt time.Time // For scheduling.
LastAttempt *time.Time
LastError string
Has8bit bool // Whether message contains bytes with high bit set, determines whether 8BITMIME SMTP extension is needed.
SMTPUTF8 bool // Whether message requires use of SMTPUTF8.
Size int64 // Full size of message, combined MsgPrefix with contents of message file.
Has8bit bool // Whether message contains bytes with high bit set, determines whether 8BITMIME SMTP extension is needed.
SMTPUTF8 bool // Whether message requires use of SMTPUTF8.
Size int64 // Full size of message, combined MsgPrefix with contents of message file.
MessageID string // Used when composing a DSN, in its References header.
MsgPrefix []byte
// If set, this message is a DSN and this is a version using utf-8, for the case
@ -199,7 +200,7 @@ func Count(ctx context.Context) (int, error) {
// this data is used as the message when delivering the DSN and the remote SMTP
// server supports SMTPUTF8. If the remote SMTP server does not support SMTPUTF8,
// the regular non-utf8 message is delivered.
func Add(ctx context.Context, log *mlog.Log, senderAccount string, mailFrom, rcptTo smtp.Path, has8bit, smtputf8 bool, size int64, msgPrefix []byte, msgFile *os.File, dsnutf8Opt []byte, consumeFile bool) (int64, error) {
func Add(ctx context.Context, log *mlog.Log, senderAccount string, mailFrom, rcptTo smtp.Path, has8bit, smtputf8 bool, size int64, messageID string, msgPrefix []byte, msgFile *os.File, dsnutf8Opt []byte, consumeFile bool) (int64, error) {
// todo: Add should accept multiple rcptTo if they are for the same domain. so we can queue them for delivery in one (or just a few) session(s), transferring the data only once. ../rfc/5321:3759
if Localserve {
@ -220,7 +221,7 @@ func Add(ctx context.Context, log *mlog.Log, senderAccount string, mailFrom, rcp
}()
now := time.Now()
qm := Msg{0, now, senderAccount, mailFrom.Localpart, mailFrom.IPDomain, rcptTo.Localpart, rcptTo.IPDomain, formatIPDomain(rcptTo.IPDomain), 0, nil, now, nil, "", has8bit, smtputf8, size, msgPrefix, dsnutf8Opt, ""}
qm := Msg{0, now, senderAccount, mailFrom.Localpart, mailFrom.IPDomain, rcptTo.Localpart, rcptTo.IPDomain, formatIPDomain(rcptTo.IPDomain), 0, nil, now, nil, "", has8bit, smtputf8, size, messageID, msgPrefix, dsnutf8Opt, ""}
if err := tx.Insert(&qm); err != nil {
return 0, err

14
queue/queue_test.go
View File

@ -85,11 +85,11 @@ func TestQueue(t *testing.T) {
}
path := smtp.Path{Localpart: "mjl", IPDomain: dns.IPDomain{Domain: dns.Domain{ASCII: "mox.example"}}}
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), nil, prepareFile(t), nil, true)
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), "<test@localhost>", nil, prepareFile(t), nil, true)
tcheck(t, err, "add message to queue for delivery")
mf2 := prepareFile(t)
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), nil, mf2, nil, false)
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), "<test@localhost>", nil, mf2, nil, false)
tcheck(t, err, "add message to queue for delivery")
os.Remove(mf2.Name())
@ -293,7 +293,7 @@ func TestQueue(t *testing.T) {
// Add a message to be delivered with submit because of its route.
topath := smtp.Path{Localpart: "mjl", IPDomain: dns.IPDomain{Domain: dns.Domain{ASCII: "submit.example"}}}
_, err = Add(ctxbg, xlog, "mjl", path, topath, false, false, int64(len(testmsg)), nil, prepareFile(t), nil, true)
_, err = Add(ctxbg, xlog, "mjl", path, topath, false, false, int64(len(testmsg)), "<test@localhost>", nil, prepareFile(t), nil, true)
tcheck(t, err, "add message to queue for delivery")
wasNetDialer = testDeliver(fakeSubmitServer)
if !wasNetDialer {
@ -301,7 +301,7 @@ func TestQueue(t *testing.T) {
}
// Add a message to be delivered with submit because of explicitly configured transport, that uses TLS.
msgID, err := Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), nil, prepareFile(t), nil, true)
msgID, err := Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), "<test@localhost>", nil, prepareFile(t), nil, true)
tcheck(t, err, "add message to queue for delivery")
transportSubmitTLS := "submittls"
n, err = Kick(ctxbg, msgID, "", "", &transportSubmitTLS)
@ -325,7 +325,7 @@ func TestQueue(t *testing.T) {
}
// Add a message to be delivered with socks.
msgID, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), nil, prepareFile(t), nil, true)
msgID, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), "<test@localhost>", nil, prepareFile(t), nil, true)
tcheck(t, err, "add message to queue for delivery")
transportSocks := "socks"
n, err = Kick(ctxbg, msgID, "", "", &transportSocks)
@ -339,7 +339,7 @@ func TestQueue(t *testing.T) {
}
// Add another message that we'll fail to deliver entirely.
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), nil, prepareFile(t), nil, true)
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), "<test@localhost>", nil, prepareFile(t), nil, true)
tcheck(t, err, "add message to queue for delivery")
msgs, err = List(ctxbg)
@ -473,7 +473,7 @@ func TestQueueStart(t *testing.T) {
}
path := smtp.Path{Localpart: "mjl", IPDomain: dns.IPDomain{Domain: dns.Domain{ASCII: "mox.example"}}}
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), nil, prepareFile(t), nil, true)
_, err = Add(ctxbg, xlog, "mjl", path, path, false, false, int64(len(testmsg)), "<test@localhost>", nil, prepareFile(t), nil, true)
tcheck(t, err, "add message to queue for delivery")
checkDialed(true)