If statement being ignored by PHP

Hello, I've got an a small script in which I would like to be able to first verify that a field isn't empty and if that field isn't empty, I'd like it to print a form. If the posting from the form is yes, I'd like to mail a message. Can someone tell me why my if statement is being ignored and why the message is posted directly before I have entered anything into the form? Here's the script: if ($semail!=""): $post=""; echo "<form method=\"POST\" action=\"send.php3\">"; echo "<input type=\"radio\" value=\"yes\" NAME=\"post\">Yes, please send my card!"; echo "<input type=\"radio\" value=\"no\" NAME=\"post\">No, I will try again."; echo "<input type=\"submit\" value=\"Submit\"></form><br>"; if ($post="yes"): mail("$recipient <$remail>", "$sender has sent you a card", $message,"From: $semail \nReply-To: $semail\nX-Mailer: PHP3"); echo "Your card number $idnumber has been sent to $recipient."; endif; endif; Thanks! Mike -- Mike A. Gifford OpenConcept Consulting Mike@OpenConcept.On.Ca Http://www.OpenConcept.On.Ca Web Design, Hosting, Graphic Design & Site Promotion Featured Site --> Http://WTOAction.Org