I think we discussed this over the phone. Is it the suggestion that Blesta would communicate with the customer through the PayPal email address they paid with? For example, send welcome email to their PayPal email address?
Since they can provide a different email address when signing up, and likely prefer to be contacted at that address, there isn't a clear answer. For example, many companies use an address like paypal@domain.com which goes to their accounting department. If Blesta ignored the clients contact email address and sent a notice to the PayPal one, it may end up in the hands of someone else, who it's not really intended for.
I'm curious what the suggestion is, specifically, in how Blesta should handle this.