Hello I wanted to start using zcal but it appears that the booking confirmation emails fall into the spam folder of certain users (at least one mailbox, the one of my wife who tested it). I had selected zcal on a process to become a paid subscriber. Sorry to say I replaced the booking link with another provider's immediately.
The mailbox that rejected your mail is one I rent with Hostinger.
Thanks for help
Rgds
Christophe