Email subject and random code

[Jose197]

Hello I have a question with the sendmessage.php.

In the Subject part I can only add clients that I have previously selected to send a message.

I would like to know if there is any way to modify it so that directly there you can select a client or write an external email to send an email.

I'd also like to know if you can add a field something like {$ code_id} and have it load a random code in the message. This is to be used as a security code.

Thanks for reading and for your reply.