On Wed, 9 Jun 2010, Ken Irwin wrote: > We originally tried changing the From and Reply-To mail headers, but the > phones we tested on didn't honor the email headers. Instead they show an > address @www6.wittenberg.edu (ie, our web server). That's why I was > thinking there would be some sort of SMS-equivalent-header that it cared > about more. Are you changing the line 'From:' (the "From header") or 'From ' (the "envelope from", which is part of the SMTP protocol's routing, and *not* part of the e-mail message) I don't know if this will help or not, but it sounds like the -f flag is the way to go: http://stackoverflow.com/questions/179014/how-to-change-envelope-from-address-using-php-mail -Joe > -----Original Message----- > From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Thomas Bennett > Sent: Wednesday, June 09, 2010 9:36 AM > > > I don't know if this will be any help but you would need to replace the reply- > to header I expect. > > Thomas >