A quick fix
I fix a warning when we send the card in attachment.
I also change the sender email and name, now I use the one set in the Joomla admin, this fix some issue when the card get into the spam box because it was not send by the right sender.
The CGC v.1.6.7 is ready to download
P.S. I begin to work on the new big release v1.7.0, cool new features. Hope to finish for Feb. 2013