---
name: "nullmailer"
section: "7"
platform: "linux"
package: "nullmailer"
version: "2.2-4"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/nullmailer"
---

# nullmailer(7)

Overview of nullmailer documentation

## NAME

nullmailer - Overview of nullmailer documentation

## INTRODUCTION

**nullmailer** is a simple and secure relay-only mail transport agent.

Documentation on how messages are reformatted and injected into the queue can be found in [**nullmailer-inject**(1)](/nullmailer-inject/1.md). Documentation on how messages are actually inserted into the queue can be found in [**nullmailer-queue**(8)](/nullmailer-queue/8.md). The process of sending queued messages is described in [**nullmailer-send**(8)](/nullmailer-send/8.md).

The following table lists all the control files used by **nullmailer**.

```
control file	used by
adminaddr nullmailer-dsn, nullmailer-queue
allmailfrom nullmailer-queue
defaultdomain nullmailer-dsn, nullmailer-inject
defaulthost nullmailer-dsn, nullmailer-inject
doublebounceto nullmailer-dsn
helohost nullmailer-send
idhost nullmailer-dsn, nullmailer-inject
maxpause nullmailer-send
me nullmailer-dsn, nullmailer-inject
pausetime nullmailer-send
remotes nullmailer-send
sendtimeout nullmailer-send
```