Thank you for reaching out!
Proton mail is notorious for blocking our emails due to its intricate encryption. Unfortunately, we have no control over this.
You will probably need to add our email address - support@photoreflect.com - to your safe senders/whitelist:
https://proton.me/blog/how-to-whitelist-an-email-address
You can also log in with your Customer Number <--INSERT CUST NUMBER--> under Friends & Family Log in.
Congratulations and warm regards,
<--YOUR NAME HERE-->
Mom365 Customer Support