On Fri, Nov 7, 2014 at 1:59 PM, Keith Keller <kkeller at wombat.san-francisco.ca.us> wrote: > On 2014-11-07, Iain Morris <iain.t.morris at gmail.com> wrote: >> For some fast and free monitoring along with DNS >> verification/blacklist/config checks of your MX records, MXToolbox >> lets you monitor one domain for free. Nice to have an external, >> independent source checking your public MTA. Nagios is still what I >> would choose for minute-by-minute checks but MXToolbox is free, and >> isn't tied to your infrastructure in any way. > > I know we're getting a littl off topic, so I'll ask first: there are a > bunch of external services I use to monitor things like DNS and SMTP > which are difficult to get a true handle on from the inside. Is it too > off-topic to talk about some of these resources on list? > > (MXToolbox looks pretty interesting, I'll look into it for myself > later.) If you want to run your own - and have remote systems to handle it, opennms can run remote monitor agents (via java remoting) that report back to the central server. -- Les Mikesell lesmikesell at gmail.com