<div dir="ltr">Yes, I'm talking about Postini (which no longer exists, due to being assimilated by Google), and friends. I currently use Edgewave's ePrism hosted email filtering service.<div><br></div><div>SpamAsssissin-on-steriods-as-a-Service is available from some very nice people in Ottawa, by the name of Roaring Penguin, welll worth considering.</div><div><br></div><div>I've used MXLogic as well (which I believe Intel is in the midst of killing), and Barracuda in various forms as well (they have both appliances and online offerings). There are dozens of such services in the world (back when Postini went bust, I evaluated about 18 different services, before selecting Edgewave, though Roaring Penguin was very close). I've heard of PostLayer, and understand both their service and pricing to be good as well. </div><div><br></div><div>The main thing you are looking for is:</div><div> - a service which you point your MX at, and then go in and configure it to relay to your mail server</div><div> - you configure the IPTables/firewall such that *only* the filter gets to connect to your port 25 (if you want to relay email, leave 587 open, ensure TLS is good, and that every connection there needs a valid authentication)</div><div> - a service that allows you to configure you mail server to Smart Host out via the service, so that it's their IP block, not yours, that the receiving server sees.</div><div><br></div><div>-Cedric</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 15 December 2016 at 21:10, Remi Gauvin <span dir="ltr"><<a href="mailto:remi@georgianit.com" target="_blank">remi@georgianit.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 16-12-15 01:48 PM, Bob Jonkman wrote:<br>
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I think Cedric is referring to Postini, and other "SpamAssasin As A<br>
Service" providers ;-)<br>
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I was quite pleased with <a href="http://postlayer.com" rel="noreferrer" target="_blank">postlayer.com</a><br>
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(no affiliation, just a happy customer... I'm sure there are other locals providing similar service, would be interested in any other shameless plugs.)<br>
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