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SMTP Open Relay Test

Testing on port 25... Error - could not connect to server
Hostname or IP address:
report open relays to DSBL (Distributed Sender Blackhole List)

If you are interested in finding software to block spam, you can browse our software section or alternatively take a look at our customizable server-based anti-spam software feature comparison; you can check out the ones listed which have public blacklist support here or else tweak the settings yourself here.

Also, you might be interested in taking a look at our services section (eg managed anti-spam solutions) or our appliances section (machines built specifically to stop spam).

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