Hey!
Suddenly and unexpectedly!
I am not able to send a email with the Email Tool to myself. (The mail address is my Alteryx serial number)
And I am not able to send a email with the Email Tool to an other valid email address with the same ending of my serial number! (the same ending of my company)
like: info@...
The error message:
Error: Email (1): Record#1: Unable to send email: "Error with Recipients: ...

My colleague get the same error message!!
A new email blacklist? 
Get anyone else the same feature?
Mathias