Suggestion for PMG quarantine

[robertut]

cPanel has a nice feature to filter spam from greylists. It sends back to the sender an e-mail message:

The message you sent requires that you verify that you
are a real live human being and not a spam source.

To complete this verification, simply reply to this message and leave
the subject line intact.


Or, you can click the following link:

http://gateway.domain.example/cgi-sys/bxd.cgi?a=recipient@domain.example&id=9ewrw23edFsvVUC2H-1677783099


The headers of the message sent from your address are shown below:
<...>

This allows for the sender to trigger delivery of the message from the quarantine. This also adds the sender's address to the whitelist, so next time this routine is not needed anymore.

 

[Fathi]

I thought of a manual whitelisting mecanism where people have to send their email address by sms to given number to get added to a whitelist before being able to send to our domain. Did not implement it yet, but this looks like what cpanel seems doing.