---
name: "nullmailer-smtp"
section: "8"
platform: "linux"
package: "nullmailer"
version: "1:2.2+10~g7ed88a0-6.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nullmailer-smtp"
---

# nullmailer-smtp(8)

smtp mail sender for nullmailer

## NAME

nullmailer-smtp - smtp mail sender for nullmailer

## SYNOPSIS

**/usr/lib/nullmailer/smtp \[flags\] remote-address \< mail-file**

## DESCRIPTION

Send an email message via SMTP

## OPTIONS

- **-p, --port=INT**

  Set the port number on the remote host to connect to

- **--user=VALUE**

  Set the user name for authentication

- **--pass=VALUE**

  Set the password for authentication

- **-d, --daemon**

  use syslog exclusively

- **-s, --syslog**

  use syslog additionally

- **--auth-login**

  Use AUTH LOGIN instead of auto-detecting in SMTP

- **--ssl**

  Connect using SSL (on an alternate port by default)

- **--starttls**

  Use STARTTLS command

- **--x509certfile=VALUE**

  Client certificate file

- **--x509cafile=VALUE**

  Certificate authority trust file (Defaults to /etc/ssl/certs/ca-certificates.crt)

- **--x509crlfile=VALUE**

  Certificate revocation list file

- **--x509fmtder**

  X.509 files are in DER format (Defaults to PEM format)

- **--insecure**

  Don't abort if server certificate fails validation

- **-h, --help**

  Display this help and exit

- [**nullmailer-send**(8)](/nullmailer-send/8.md),

  ## SEE ALSO

[**nullmailer-qmqp**(8)](/nullmailer-qmqp/8.md)