I have a hopefully simple question and for whatever reason I can't seem to find a way to get it to work. Long story short, in a given SMTP time ACL, as part of my final accept I might add a custom header for debugging/tracking purposes. What I would like to do is detect if the header already exists prior to adding it. I'm assuming I can use a condition that detects if $h_X-HEADERNAME is present and if not add_header. I'd like to do this at ACL time rather than in the router or transport using header_add or header_remove. Any thoughts on this would be appreciated. I'm sure this is easy, I've heard of this looking for the X-SPAM-STATUS header added by SA and if it detects an existing one, do some action.
Thanks, James -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
