My host has advised me with this message I turned off "authentication before send", and I would like to keep it on. Could you please see if there is a way of PHP authenticating with Microsoft SMTP server before sending emails. I will leave it off for now, but for the purposes of anti-spam, I would like to have it back on again in a couple of days. Does anyone have some advice on what I can suggest to him Thanks Tony Ayling -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]