---
name: "smtpping"
section: "1"
platform: "linux"
package: "smtpping"
version: "1.1.4-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/smtpping"
---

# smtpping(1)

SMTP benchmarking and measurement tool

## NAME

**smtpping** – SMTP benchmarking and measurement tool

## SYNOPSIS

**smtpping** \[**-dqrJ46C**\] \[**-p** *port*\] \[**-w** *wait*\] \[**-c** *count*\] \[**-P** *parallel*\] \[**-s** *size*\] \[**-f** *file*\] \[**-H** *hello*\] \[**-S** *sender*\] *recipient* \[*@server*\]

## DESCRIPTION

**smtpping** is a small tool that performs SMTP server delay, delay variation and throughput measurements.

It must be invoked with the *recipient* email address. Normally, the *server* should also be specified (prefixed with @); otherwise **smtpping** will try to find the recipient domain's MX record, falling back on A/AAAA records.

The following options are available:

- **-4**

  Use IPv4.

- **-6**

  Use IPv6.

- **-p** *port*

  Specifies the TCP port to use (default: 25).

- **-w** *wait*

  Time in milliseconds to wait between pings (default: 1000).

- **-c** *count*

  Number of pings to send (default: unlimited).

- **-P** *processes*

  Number of parallel worker processes (default: 1). To measure throughput, it's recommended to use **-r** and **-w0** with this option.

- **-s** *size*

  Ping message size in kilobytes (default: 10). Cannot be used in conjunction with the **-f** option.

- **-f** *file*

  Send the specified email file (message/rfc822) instead of a generated message. Cannot be used in conjunction with the **-s** option.

- **-H** *helo*

  HELO name (default: localhost.localdomain).

- **-S** *sender*

  Sender address (default: \<\>).

- **-C**

  Use CHUNKING (BDAT)

- **-r**

  Display rate instead of transaction delays. To measure throughput, it's recommended to use **-w0** and possibly **-P** with this option.

- **-q**

  Display less verbose output.

- **-d**

  Display more verbose output.

## AUTHORS

The **smtpping** program was written by Anders Berggren ⟨*anders@desh.se*⟩ and Erik Lax ⟨*erik@datahack.se*⟩ for Halon Security AB.