Re: Why do I keep getting a 501 mail error?

* Thus wrote Brian Dunning: > Developing on a Windows server to be deployed on Linux. I get "SMTP > server response: 501 Bad address syntax." Here's my code: > > $mail_from = 'My Name <name@domain.com>'; > $mail_server = 'mail.servername.com'; // This is hosted externally > ini_set("SMTP", $mail_server); > ini_set("sendmail_from", $mail_from); > $mail_to = "$first_name $last_name <$email>"; I know this isn't going to help your problem but... you should quote this mail_to: $mail_to = '"' . str_replace($first_name, '"', '\"') . ' ' . str_replace($last_name, '"', '\"') . '" ' . <$email>"; It will prevent 'To' injection: $last_name = "<email1@anotherplace>,<email-infinity@enless.com>,"; without it: To: <email1@anotherplace>,<email-infinity@enless.com>,<real@address.com> with quoted: To: "<email1@anotherplace>,<email-infinity@enless.com>," <real@address.com> With the latter only sending one email verses however many one person whishes. Curt -- First, let me assure you that this is not one of those shady pyramid schemes you've been hearing about. No, sir. Our model is the trapezoid!