Hem it's not a GMail specific feature but a common one (sub-addressing/plus addressing, RFC 5233) that skip inbox and drop messages in the +$name/tag dir/label.

Hem it's not a GMail specific feature but a common one (sub-addressing/plus addressing, RFC 5233) that skip inbox and drop messages in the +$name/tag dir/label... The GMail specific feature is adding dots as you want in your mail localpart so (foobar, f.oo.bar, f.o.o.b.a.r etc @gmail are the very same mailbox).