I got a small surprise using craigslist email.

It seems that seller-buyer emails are anonymized by craigslist. However, it seems that this is only when using the PC.

If I respond to the emails when using the phone, my real email username address gets used rather than the being anonymized.

Does anyone know why this would be? Is there some setting on the phone that is not set correctly? Or why the different behavior on phone vs PC? How do I fix this?

On iCloud+ there is a switch you can turn on.
(Settings - Apple ID - iCloud+ - Hide My Email)
On Android, I don’t have any idea.