如何从php文件发送电子邮件？

Question

I know about the mail function in php: mail ($to, $subject, $msg_body,$headers);

But since I cannot access my host's php.ini file, I've been provided with the following details:

SMTP host: mailout.host.com 
Port: 25 SMTP
Username: [e-mail]
SMTP Password: not required
Authentication: Disabled
Encryption: Disabled

How can I use these details to send out emails?

EDIT: I used example pointed by Blender (below) and it seems to work fine for all emails except gmail. Any idea why? Is it to do with Fully Qualified Address?

Answer 1

You can use SwiftMailer (http://swiftmailer.org/) to send out emails through any email account you can login to, including gmail. It's very robust, but does have a bug where it uses a lot of memory for emails that have a lot of html in them.