----Question---- What would be the best way to verify that the target mail server is alive and if not re-route it to a "backup" mail server?
----Scenario---- We have front-end "filter" servers (or relay servers) that provide MD/SA/Clam/etc. The goal is to identify that a back-end server has gone down and re-route the mail to a backup mail server. To support "md_check_against_smtp_server" we have a database keyed by domain that identifies which back-end server to validate the user on. Using this same database would check that server. We could either modify our filter to check if the server is alive everytime (expensive???) or have a daemon/cronjob run every minute/5 to populate another database with server status. Ultimately we would like something similar to "md_check_against_smtp_server", maybe "md_check_smtp_server". If this returned "false" we would change the envelope to the backup. Also, we are NOT wanting to perform the backup via dns. We could have another MX with a higher weight but our goal is to have a non-published backup mail server. Any ideas? Thanks, -Bob _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
