Hi list, I've installed OpenSMTPD on a fresh OpenBSD to act as a simple-yet-powerful MX for inbound trafic. Our current zimbra mono-server installation is quite bad at spam detection thus I gave a try to rspamd.
First results are encouraging and I really appreciate the ease of configuration of OpenSMTPD and the clarity of its logs. I'd like to add a feature to our setup : prefixing all incoming emails' subject with a string, only once (i.e. not if the said string is already in the subject). It seems to me that this should be made as a filter in OpenSMTPD, with a low-precedence to be placed after DKIM verification. I'd like to give a try at this solution. Do you have pointers to the filter protocol or to an hello-world filter ? Thanks, Ionel -- 232 avenue Napoleon BONAPARTE 92500 RUEIL MALMAISON Capital EUR 219 300,00 - RCS Nanterre B 408 832 301 - TVA FR 09 408 832 301