EmailSetHeader problem with "return-path"

[pbelanger]

Hello, Why "return-path" doesn't work and the reply-to work fine?

 

 

EmailRegister( Data Post::license ; Data Post::license_to ) And 

EmailConnectSMTP( Data Post::SMTP server ) And 

EmailCreate( Data Post::SMTP ADRESSE ; Data Post::test ADRESSE ; Data Post::Sujet:) And 

 

EmailSetHeader( "return-path" ; "[email protected]" ) And

EmailSetHeader( "reply-to" ; "[email protected]" ) And

 

EmailSetBody( Data Post::Html compile; "html" ) And

EmailSend And

EmailDisconnect

 

 

according to : http://tools.ietf.org/html/rfc4021#section-2.1.2 it' a valide field?