Re: Ping for primary MX

[Justin Mason <jm...@jmason.org>]

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Daniel Quinlan writes:
> Kenneth Porter <sh...@sewingwitch.com> writes:
> 
> > Has anyone written a plugin for SA3 that pings the higher-priority MX
> > peers for a domain and boosts the spam score if they're up?
> 
> No, but by my quick test here it would help a bit.  0.22% of my spam and
> 9% of my missed spam was sent via my secondary MX.  It's just never been
> a high enough of a priority to actually write a rule.
> 
> It's also not just enough to ping the higher priority MX peers because
> the spam checker might be running on the primary MX only so it would
> only receive delayed mail from the backup MXes once it was back up.

Also, the high-pri MX might be up in the ping sense (at the IP layer), but
not up in the "processing SMTP mail" sense (at port 25).

> Perhaps something like:
> 
>  - a higher priority MX is up
>  - the mail was delivered from a secondary MX with little or no delay

that might work alright...

- --j.
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