PHP mail() rejected by SMTP

Posted on 16th Feb 2014 by admin

I'm currently working on a newsletter application which is installed on a windows 2003 server running apache. This server is scheduled to run a script every 5 minutes that will send an email to 10 individuals during each iteration. It all works fine when sending to emails registered with our mail server but when sending to external addresses I get a 550 error from the smtp.

I've setup these settings in php.ini:Quotesmtp = mail.*public_domain*.se
smtp_port = ****
username = *noreply email account*
password = *******

sendmail_from = *same as username*

Is there something obvious i'm missing here?

Other forums