PHP email library/module recommendations

Hi,

My (built from scratch) PHP website currently sends out its emails (confirmations, etc) via hand rolled scripts using the mail() function. However it's getting a bit onerous to manually manage UTF8, HTML mail, MIME, etc, etc

I see there's quite a wide range of pre-built libraries and modules to support emailing from within PHP so I'd love some advice, experience and recommendations from other linoders.

I would like something relatively light-weight to manage the formatting and sending of mails that can manage HTML, MIME, UTF8, inline images, attachments possibly, etc.

I've come across pear, phpmailer anything else I should consider?

Thanks