Trying to send email from PHP running on CentOS 4 through an SMTP host running sendmail on CentOS 4.
The problem I'm having is that I'm getting a 550 5.7.1 Access Denied error even though I've added the sending server's DNS name to /etc/mail/relay-domains.
Yes, I have restarted sendmail.
I must be missing a step somewhere because I've used the relay-domains file before to grant access to remote users who send email with their Treos.
Start Free Trial