I left it in, and also added a cc to my webassist email address.
I also tested using the original to address you had supplied and set it to cc my Gmail address.
I was not able to receive the email at my webassist email address, but was able to receive the email when sent to my gmail address whether it was the To address or the CC address.
for some reason the SMTP server is refusing to relay the email to any address being used, except my gmail address. the smtp server error logs should be able to shed some light on why.