External email host options

We have a new PHP website that we just set up on DH and I am a little concerned about hitting the email limit imposed by DH. I do have an external SMTP host I can use but am not sure about what is the best way to proceed on the server since there are php.ini limitations and such. Can anyone recommend a server side setup that will work with PHP and get us to send emails out to our external host? Is PEAR the way to go?

Thanks!
Rob

You can host your email server else. Gmail is a good option
http://wiki.dreamhost.com/Gmail

GMail is really not an acceptable option for sending email from a web site — their sending limits aren’t documented, but are in all likelihood far lower than ours. Trying to send bulk email through a GMail account will probably result in its being closed in short order.