Michael Baierl (Thursday, 2008-03-13):
BUT why should a PHP app take care of sending mails if you have Sendmail on the computer? That's why it is usually installed there - to send mails and as far as I know sending mails using Sendmail works perfectly fine.
And don't forget about extremely light sendmail drop-ins that do just one thing: get the mail to the next mail hub (aka 'smarthost', wherever that word comes from ;) ). Example: ssmtp (ftp://ftp.debian.org/debian/pool/main/s/ssmtp/). Installed and configured on any Linux system within two minutes.
In my humble opinion: don't waste a minute on SMTP handling.
Patrick.