Fastmail allows for aliasing too - username@domain.tld -> bank@username.domain.tld, retailer@username.domain.tld, etc. Pretty convenient. I use that feature pre

Fastmail allows for aliasing too - username@domain.tld -> bank@username.domain.tld, retailer@username.domain.tld, etc. Pretty convenient. I use that feature pretty often and I can only recall one instance which seemed to indicate my address was sold to spammers. It’s more useful for organizing incoming mail, like plus-aliasing in gmail.