I\'m in need of setting up an auto-response from an email account that I control, based on trigger words
within the body of the email. But also, it needs to add/de
You can alias your email address directly to a php script if you run your own mail server (on linux this would just be in the /etc/alias file or equivalent where the target was your php script instead of an email address) eg http://www.topwebhosts.org/bbs/board.php?bo_table=server_mgmt&wr_id=73
If not, then your only real choice is to set up a php process that checks an email address for mail every x minutes.
I have used both these methods over the years to great success
You can walk through emails with PHP's IMAP
functions and undertake action (based on conditions/content). More info.