Check your outbound email Spammyness and website Spoofyness.

The website ” Treehouse “,,
by some very clever developers, allows you to check the spammyness of your outbound emails. It also provides a way for website / domain owners or administrators to check their sites spoofyness. It’s a website, not an app, so no download required, but you can add them to your home screen for a one touch link Web app if you use it regularly.

Contents of this blog post:

  1. What is spam? Definition and types.
  2. Check your outbound spammyness with “Treehouse” mail-tester
  3. What is spoofing? Definition and types.
  4. Check your website / domains spoofyness with “Treehouse” mail-tester.
  5. URL : optional copy and paste urls if the links in the blog don’t work on certain platforms eg. email
  6. Disclaimer

Most people are familiar with spam, but may not be aware of the many types.

What is Spam? Definition & Types

While “Treehouse” mail-tester checks your outbound email for spammyness so your recipients will receive it in their inbox, there are many types of spam that recipients need to be on the lookout for.

Below is an excerpt from a very descriptive analysis of spam by


“This article is all about spam—and that’s spam with a lowercase “s.” Not to be confused with the polarizing luncheon meat. Because a lot of people around the world love Spam (especially Guam), but everyone hates spam.”

The article has detailed sectioned descriptions about.
▪️What is the definition of spam?
▪️What is the history of spam?
▪️What are the types of spam?
▪️Advance-fee scams
▪️Phishing emails
▪️Spam on mobile
▪️How can I stop spam?



Check your outbound email spammyness.

To view HD video quality of this Gif 👉Link: Treehouse video

“Treehouse ” mail-tester. com

For individuals or businesses who casually want to check to make sure your emails will be seen by your intended recipient, it is free to check 3 emails a day.

If you send a lot of emails
▫️ Newsletters.
▫️ Blog posts via email.
▫️ Notifications via email.
▫️ Email subscriptions.
▫️ Or send out a lot of emails for your business in general.
You can purchase different packages. Which also supports the developers.

It’s very easy to use and their Facts & Questions page is very helpful.

It gives your outbound email a rating out of 10 and an itemised break down for what it checks.

Results: screenshot from Treehouse website. mail-tester. com

Tip: If you use it on a mobile phone, best to use split screen with your email app, if your phone has it. You will have to keep a browser tab open, to keep the uniquely generated email address they give you, as each time you open the  Treehouse, mail-tester website window a new email address is created. So don’t click the clear / bin button when you exit, to send your email, especially if you have it pre-set to automatically clear your history on exiting. Otherwise best to use a laptop or desktop.


Screenshot from Treehouse website, Instructions text added by

👇Link: Check your outbound email spammyness.


What is Spoofing? Definition & Types

Spoofing is basically impersonation, stealing the identity of a trusted source, it is illegal in many countries and can take on many forms. While most people are familiar with spam, spoofing is not as widely understood, yet it is extremely damaging to the intended recipient and the source from which the identity was stolen through impersonation.

Below inset is an excerpt from an excellent comprehensive but easy to understand article on Spoofing by


“Spoofing is the act of disguising a communication from an unknown source as being from a known, trusted source. Spoofing can apply to emails, phone calls, and websites, or can be more technical, such as a computer spoofing an IP address, Address Resolution Protocol (ARP), or Domain Name System (DNS) server.”

The article on their website goes on to give detailed explanations about
▪️Email Spoofing
▪️Caller ID Spoofing
▪️Website Spoofing
▪️IP Spoofing
▪️ARP Spoofing
▪️DNS Server Spoofing



Check your domain – websites Spoofyness.

Check your SPF and DKIM keys
If you have a website – domain, then you can check your domains status against spoofing, phishing or impersonation.


Screenshot from Treehouse website, Instructions text added by

Tip: Enter your domain name. DKIM selector – enter your email provider that you use through your website / domain eg. Protonmail, gmail, outlook, etc. as it appears in the DKIM

👇 Link: Check your domains / websites spoofyness.


Shout out to ProtonMail, the email service Hmmstudio uses, for providing this helpful link to “Treehouse”


  • This is not a paid endorsement by any individual, business or organisation.
  • Just passing on information for others to use or make their own assessments.
  • Hmmstudio is not responsible for any changes to pricing or access to the website.
  • Research and check your browser links are secure before proceeding.


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