@danieh_6 wrote:
Yeah exactly I know AP is optional for normal delivery, but fastway and sendle actually require it to send any parcel. What about other couriers? DHL, FedEX, UPS, ??

Anyway the amount of people contact outside ebay imo is not from email, mainly phone but also lot of high volume business sellers will use their email address to sign up for newsletters

As you said not really thought through.

no, that is not correct Fastway and sendle do not require the email address and even if they do, it will be a system generated email that does not exist.Does not have to be a valid email

All Marketplaces like Amazon, Catch, Kogan and so on , do not give sellers acces to buyer email and they all ship millions of parcels just fine