On 2018-04-20 at 20:09 -0400, Viktor Dukhovni via Exim-dev wrote: > Question about this "$host". Are smarthost settings ever subject to > MX lookups, so that the actual remote SMTP server is one of the MX > hosts of the smarthost domain?
Not with the format specified in the example configuration. It would require explicit configuration action to subject them to MX. The SMTP Transport is given a list of valid hostnames to try. It knows nothing about MX lookups. The `dnslookup` Router driver knows about MX lookups and is how they're normally done. Here though, we're using the `manualroute` Router driver. <https://www.exim.org/exim-html-current/doc/html/spec_html/ch-the_manualroute_router.html> It's possible to follow the specified hostname with `/MX` to enable MX lookups. That doesn't make much sense for smarthost. We can consider adding some text explicitly warning people against that. -Phil -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
