Strange double signup email?

Hello,

I started receiving a second signup welcome email and I don't know where is it coming from. The only extra that I've installed recently is the PMS.

The contents are:
>>>>>>>

---

This is a message from Unnamed user at (My Site's Name) ( www.myurl ....) to you:

---

Hello (FirstName) (Lastname), Welcome to our site!

---

NOTES:

---

When replying, please check carefully that the email address of Unnamed user is .

This user did not see your email address. If you reply the recipient will have your email address.

(My Site's Name) owners cannot accept any responsibility for the contents of the email and of user email addresses.

>>>>>>>>>>>>

Notice the "Unamed user" !!!
The only parts I have substituted above are the ones in the ().
Any ideas where is this coming from ? :huh:

Edit: It is coming from the main site's email address exactly line the welcome email from CB.

N

Ensure you've latest CB 2.x nightly build installed.

www.joomlapolis.com/downloads/doc_details/640-community-builder-nightly-build

Next ensure you've latest nightly or build of your plugins installed according to the chart below.

www.joomlapolis.com/cb-20-addon-status

Next run CB > Tools and run the various database checking tools. Now within CB > Plugin Management ensure CB Core is public and published (should be forced and unchangeable). Then ensure the name, username, formatname, email, and password fields are accessible (on a published tab at the least).

If issue persists check if CB Auto Actions is installed as a Registration firing on the after registration trigger could probably do this.