Good point. However, things change, and this norm should evolve with the involved technologies; also, maybe this data quality process, if abusing third-parties resources (like RCPT TO: for nothing), is not an acceptable process. Offline acquisition of online-related data (an email address, for instance) definitely is odd by definition. I don't know, just from the top of my head, print a QR code printed on the paper so users could register online, from their smartphone.
Also, if I'm not mistaking, list-validation services are mainly targeting online businesses, so even if the there might be legit cases, I doubt the biggest part of their revenues is. -- Benjamin Billon -----Original Message----- From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Ken O'Driscoll via mailop Sent: Wednesday, 7 March, 2018 20:20 To: email@example.com Subject: Re: [mailop] Hat color of list washers / validators On Wed, 2018-03-07 at 11:21 +0000, Benjamin BILLON wrote: > To me the list-validators are dark grey hats. Their real-time service > can be legit. The rest, I don't see how. There are some industries where offline data acquisition is the norm and validation is seen as part of the data quality process. Insurance claim forms or change of contact details for $LEGACY_PROVIDER spring to mind. Ken. -- Ken O'Driscoll / We Monitor Email t: +353 1 254 9400 | w: www.wemonitoremail.com Need to understand deliverability? Now there's a book: www.wemonitoremail.com/book _______________________________________________ mailop mailing list firstname.lastname@example.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop _______________________________________________ mailop mailing list email@example.com https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop