Re: Mail Problem

Richard Lynch wrote: >>if(!mail($to,$subject,$msg,$headers)) { die("Unable to send"); } >> >> > >*IF* you are using PHP5 (?) and *IF* your security settings allow it, >the optional fifth argument will let you specify the "real" sender of >the message, which the responder may or may not be using to bounce to. > >http://php.net/mail > > Richard is correct on that. The fifth argument isn't only for the envelope sender, so ensure you include the '-f' for sendmail and compat. wrappers. php.net/mail: ChangeLog: "4.0.5 The additional_parameters parameter was added." >... which the responder may or may not be using to bounce to. > > They should *always* be sending to the envelope from address (SMTP `MAIL FROM command), with an empty envelope sender (SMTP MAIL FROM:<>`) to avoid loops. The RFC's are a rather in depth, so here is an excerpt from Wikipedia that pretty much sums up what the RFCs do contain: [http://en.wikipedia.org/wiki/Bounce_message] > The Return-Path is visible in delivered mail as header field > Return-Path inserted by the final SMTP mail transfer agent > <http://en.wikipedia.org/wiki/Mail_transfer_agent> (MTA), > also known > as mail delivery agent > <http://en.wikipedia.org/wiki/Mail_delivery_agent> (MDA). > The MDA > simply copies the *reverse path* in the SMTP MAIL FROM command into > the Return-Path. The MDA also removes bogus Return-Path header fields > inserted by other MTAs, this header field is generally guaranteed to > reflect the last reverse path seen in the MAIL FROM command. Travis Doherty