---
name: "sendmail"
section: "1"
platform: "linux"
package: "nullmailer"
version: "2.2-4"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/sendmail"
---

# sendmail(1)

sendmail emulator interface for nullmailer

## NAME

sendmail - sendmail emulator interface for nullmailer

## SYNOPSIS

**sendmail** \[ **flags** \] \[ *recipients* \] \< *message*

## DESCRIPTION

This program is a front end program for **nullmailer-inject** and **nullmailer-smtpd**. It is used by programs that expect a *sendmail* interface for sending email. After parsing the command-line arguments, this program executes either **nullmailer-inject** or **nullmailer-smtpd** depending on the presence of the *-bs* option on the command-line. See the documentation for **nullmailer-inject** for details on how messages are reformatted and queued.

## OPTIONS

- **-B TYPE**

  - **-C FILE**

  - **-d DEBUG**

  - **-h COUNT**

  - **-i**

  - **-L TAG**

  - **-N DSN**

  - **-n**

  - **-O OPTION**

  - **-o OPTION**

  - **-p PROTOCOL**

  - **-q TIME**

  - **-R RETURN**

  - **-U**

  - **-V ENVID**

  - **-v**

  - **-X LOGFILE**

  Ignored for compatibility

- **-bm**

  Read mail from standard input (default).

- **-bp**

  List information about mail queue. This executes **mailq**.

- **-bs**

  Use the SMTP protocol on standard input and standard output. This executes **nullmailer-smtpd**.

- **-F ADDRESS**

  Sets the full name of the sender.

- **-f ADDRESS**

  Sets the envelope sender address.

- **-r ADDRESS**

  An alternate and obsolete form of the -f flag.

- **-t**

  Read message for recipients and ignore the command-line arguments.

## SEE ALSO

[mailq(1)](/mailq/1.md), [nullmailer-inject(1)](/nullmailer-inject/1.md), nullmailer-smtpd(1)