[AusNOG] SMTP open relay scanning currently underway

[Shaun Ewing]

On 20/12/2012, at 1:52 PM, Heinz N <ausnog at equisoft.com.au> wrote:

> Time to check that you have no open SMTP relays. There is apparently a scan going on from IPs all over the world looking for open SMTP relays. They are trying to be sneaky by doing it every 10 or 15 minutes so you might miss it in your logs. This appears to be a rather determined attempt to find all open relays.


These scans have been going for years.

If you have an open relay and it isn't already being used to relay spam then I would be very very surprised.
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