> For the complete documentation index, see [llms.txt](https://docs.emaildelivery.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emaildelivery.com/docs/velocity-mta-continuing-education/troubleshooting-with-swaks.md).

# Troubleshooting with SWAKS

{% hint style="info" %}
Use SWAKS, the Swiss Army Knife for SMTP, to troubleshoot email delivery problems, bypassing the platform entirely and reducing variables and confounders. 
{% endhint %}

For an introduction to SWAKS see the following page: 

{% content-ref url="/pages/NTDKx1eBCp7AtRTM5Iev" %}
[Use SWAKS for testing and troubleshooting](/docs/transactional/use-swaks-for-testing-and-troubleshooting.md)
{% endcontent-ref %}

For installation on Ubuntu:

`sudo apt-get install swaks`