Sendmail not working when headers not specified

[dracan]

Hi. I'm having trouble getting my local XAMPP server to send emails via my remote SMTP server.

In PHP, if I put:

$headers = "From: dan@fromdomain.com\r\n";
mail('dan@todomain.com', 'test', '', $headers);

Then this works. However, if I don't specify the header, ie.:

mail('dan@todomain.com', 'test', '');

Then this fails. The sendmail.log file says:

smtpstatus=554 smtpmsg='554 Message refused.' errormsg='the server did not accept the mail' exitcode=EX_UNAVAILABLE

I've tried changing my sendmail command in my php.ini to:

sendmail_path = "C:/xampp/sendmail/sendmail.exe -t -f dan@fromdomain.com"

but this doesn't work either.

Thanks for any help with this,
Dan.

ps. this is on windows.

[MC10]

Configure your sendmail.ini in the sendmail folder. See this post for more info: http://community.apachefriends.org/f/viewtopic.php?f=16&t=39649#p157913