Standalone drop-in replacement for sendmail with direct send
- Full sendmail replacement for direct mail without intermediate mail services
- One standalone binary without dependencies
- Optional SMTP and HTTP backends
- Possible use as a golang package
Download binaries from release page.
Or install from source:
go get -u github.com/n0madic/sendmail/cmd/sendmail
Usage of sendmail:
-f string
Set the envelope sender address.
-http
Enable HTTP server mode.
-httpBind string
TCP address to HTTP listen on. (default "localhost:8080")
-httpToken string
Use authorization token to receive mail (Token: header).
-i When reading a message from standard input, don't treat a line with only a . character as the end of input.
-s string
Specify subject on command line.
-senderDomain value
Domain of the sender from which mail is allowed (otherwise all domains). Can be repeated many times.
-smtp
Enable SMTP server mode.
-smtpBind string
TCP or Unix address to SMTP listen on. (default "localhost:25")
-t Extract recipients from message headers. IGNORED (default true)
-v Enable verbose logging for debugging purposes.
Send email like sendmail:
$ cat mail.msg | sendmail [email protected]
Send email like mail/mailx:
$ echo TEST | sendmail -s "Test Subject" [email protected]
Send via smart host:
$ export SENDMAIL_SMART_HOST=mail.server.com
$ export SENDMAIL_SMART_LOGIN=user # Optional
$ export SENDMAIL_SMART_PASSWORD=secret # Optional
$ cat mail.msg | sendmail [email protected]Use as SMTP service:
$ sendmail -smtp
$ telnet localhost 25
> HELO localhost
> MAIL FROM: sender@localhost
> RCPT TO: [email protected]
> DATA
...
Use as HTTP service:
$ sendmail -http
$ curl -X POST --data-binary @mail.msg localhost:8080
With authorization token:
$ sendmail -http -httpToken werf2t34cr243
$ curl -X POST -H 'Token: werf2t34cr243' --data-binary @mail.msg localhost:8080
Limit the sender's domain:
$ sendmail -http -smtp -senderDomain example1.com -senderDomain example2.com
package main
import (
"github.com/n0madic/sendmail"
log "github.com/sirupsen/logrus"
)
func main() {
envelope, err := sendmail.NewEnvelope(&sendmail.Config{
Sender: "sender@localhost",
Recipients: []string{"[email protected]"},
Subject: "Test Subject",
Body: []byte("TEST"),
})
if err != nil {
log.Fatal(err)
}
errs := envelope.Send()
for result := range errs {
switch {
case result.Level > sendmail.WarnLevel:
log.Info(result.Message)
case result.Level == sendmail.WarnLevel:
log.Warn(result.Error)
case result.Level < sendmail.WarnLevel:
log.Fatal(result.Error)
}
}
}