mirror of
https://github.com/mjl-/mox.git
synced 2024-12-27 00:43:48 +03:00
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
package smtpserver
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/mjl-/mox/dsn"
|
|
"github.com/mjl-/mox/queue"
|
|
"github.com/mjl-/mox/smtp"
|
|
"github.com/mjl-/mox/store"
|
|
)
|
|
|
|
// compose dsn message and add it to the queue for delivery to rcptTo.
|
|
func queueDSN(c *conn, rcptTo smtp.Path, m dsn.Message) error {
|
|
buf, err := m.Compose(c.log, false)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var bufUTF8 []byte
|
|
if c.smtputf8 {
|
|
bufUTF8, err = m.Compose(c.log, true)
|
|
if err != nil {
|
|
c.log.Errorx("composing dsn with utf-8 for incoming delivery for unknown user, continuing with ascii-only dsn", err)
|
|
}
|
|
}
|
|
|
|
f, err := store.CreateMessageTemp("smtp-dsn")
|
|
if err != nil {
|
|
return fmt.Errorf("creating temp file: %w", err)
|
|
}
|
|
defer func() {
|
|
if f != nil {
|
|
err := os.Remove(f.Name())
|
|
c.log.Check(err, "removing temporary dsn message file")
|
|
err = f.Close()
|
|
c.log.Check(err, "closing temporary dsn message file")
|
|
}
|
|
}()
|
|
if _, err := f.Write([]byte(buf)); err != nil {
|
|
return fmt.Errorf("writing dsn file: %w", err)
|
|
}
|
|
|
|
// Queue DSN with null reverse path so failures to deliver will eventually drop the
|
|
// message instead of causing delivery loops.
|
|
// ../rfc/3464:433
|
|
const has8bit = false
|
|
const smtputf8 = false
|
|
if err := queue.Add(c.log, "", smtp.Path{}, rcptTo, has8bit, smtputf8, int64(len(buf)), nil, f, bufUTF8, true); err != nil {
|
|
return err
|
|
}
|
|
err = f.Close()
|
|
c.log.Check(err, "closing dsn file")
|
|
f = nil
|
|
return nil
|
|
}
|