Re: [mailop] Hat color of list washers / validators

According to Talos it could be safe to block the whole /19 as I can't see other senders that could be involved: https://www.talosintelligence.com/reputation_center/lookup?search=63.250.0.0%2F19 Thousands of IPs in the block follow the same naming patterns... According to Arin:

Re: [mailop] Hat color of list washers / validators

https://ipinfo.io/AS27229/63.250.0.0/19 Bob -Original Message- From: mailop [mailto:mailop-boun...@mailop.org] On Behalf Of Al Iverson Sent: Friday, March 9, 2018 8:47 AM To: mailop <mailop@mailop.org> Subject: Re: [mailop] Hat color of list washers / validators Wow, those IP

Re: [mailop] Hat color of list washers / validators

Wow, those IPs have really poor reputations. I'm curious to know who this is if you end up figuring it out. Smells like an email validation service. Very disappointing that the domains vary and are ownership info is hidden from public view. I've had one such vendor tell me that they don't care

Re: [mailop] Hat color of list washers / validators

Speaking of.. Does anyone know this actor? Is this a list washing service.. Lot's of 'invalid users' however, large amounts of email at once to those invalid users.. Fairly big IP Space.. 63.250.8.14 1 william1.expedite.scanprofile.net 63.250.8.19

Re: [mailop] Hat color of list washers / validators

On 8 March 2018 at 16:14, Laura Atkins wrote: > On Mar 8, 2018, at 1:18 AM, Stefano Bagnara wrote: >> PS: that trendmicro article is a bit the opposit of Laura answer I got >> yesterday about "dealing with it offline because making it public is >> not

Re: [mailop] Hat color of list washers / validators

On Thu, Mar 8, 2018 at 10:51 AM, John Levine wrote: > COI is a useful tool but it is not a magic bullet. People abandon > their mailboxes and even though it doesn't bounce and nobody > complains, nobody's reading it either. Also, companies change. My favorite story about that

Re: [mailop] Hat color of list washers / validators

In article , Stefano Bagnara wrote: >> No. Never. If you do that then the address is tainted and you >> *cannot* legitimately use information as it as evidence that mail >> sent to it was unwanted. > >This is

Re: [mailop] Hat color of list washers / validators

> On Mar 7, 2018, at 5:42 PM, Michael Wise via mailop wrote: > > > Certainly not with all spam traps, but if someone is reviewing the data, and > trying to decide what to do with a sample, an "Open" message might get sent > in error. I have this weird feeling that some

Re: [mailop] Hat color of list washers / validators

> On Mar 8, 2018, at 1:18 AM, Stefano Bagnara wrote: > > > PS: that trendmicro article is a bit the opposit of Laura answer I got > yesterday about "dealing with it offline because making it public is > not the way to fix the issue" ;-) I liked that article in 2011. I don’t

Re: [mailop] Hat color of list washers / validators

On 8 March 2018 at 02:43, Steve Atkins wrote: >> On Mar 7, 2018, at 4:38 PM, Stefano Bagnara wrote: >> Let's take into consideration that spamtrap network have to do their >> homework to avoid being identified easily, so if they never do >> opens/clicks they

Re: [mailop] Hat color of list washers / validators

soft.com/en-us/download/details.aspx?id=18275> ? -Original Message- From: mailop <mailop-boun...@mailop.org> On Behalf Of Stefano Bagnara Sent: Wednesday, March 7, 2018 4:39 PM To: Aaron C. de Bruyn via mailop <mailop@mailop.org> Subject: Re: [mailop] Hat color of list w

Re: [mailop] Hat color of list washers / validators

> On Mar 7, 2018, at 4:38 PM, Stefano Bagnara wrote: > > Let's take into consideration that spamtrap network have to do their > homework to avoid being identified easily, so if they never do > opens/clicks they already put a big flash on them. So I think it is OK > for a

Re: [mailop] Hat color of list washers / validators

> On Mar 7, 2018, at 4:38 PM, Stefano Bagnara wrote: > > On 8 March 2018 at 01:02, Laura Atkins wrote: >> [...] >> Sure, we agree. But there are folks who don’t agree with us. Some of those >> folks run spamtrap networks that feel blocklist data. I

Re: [mailop] Hat color of list washers / validators

On 8 March 2018 at 01:02, Laura Atkins wrote: > [...] > Sure, we agree. But there are folks who don’t agree with us. Some of those > folks run spamtrap networks that feel blocklist data. I think it’s important > to acknowledge that. At one point you could do COI and still

Re: [mailop] Hat color of list washers / validators

> On Mar 7, 2018, at 3:40 PM, Stefano Bagnara wrote: > > On 8 March 2018 at 00:08, Laura Atkins wrote: >> [...] >> I don’t either, but I am not fighting language with folks. > > I'm sorry Laura. My mother language is not english and your "tone" is >

Re: [mailop] Hat color of list washers / validators

On 8 March 2018 at 00:08, Laura Atkins wrote: > [...] > I don’t either, but I am not fighting language with folks. I'm sorry Laura. My mother language is not english and your "tone" is unexpected to me, so I probably used wrong translations for my questions. No need to

Re: [mailop] Hat color of list washers / validators

On 3/7/2018 4:12 AM, Stefano Bagnara wrote: On 2 March 2018 at 21:45, John Johnstone wrote: One concern with respect to hat color I was thinking about was if there is a significant security threat from spear-phishing that is facilitated by the validating /

Re: [mailop] Hat color of list washers / validators

In article <760493287b1f4d1888261519139f3...@infusionsoft.com> you write: >In the worst examples I've seen, the domain went from a legitimate mail server >to a trap network in the same day, with no time for bounces in between. It's hard to believe any BL that anyone actually uses would do that.

Re: [mailop] Hat color of list washers / validators

On 7 March 2018 at 22:52, Laura Atkins wrote: > There are companies that have commercialized spamtraps and at least 2 of the > delivery monitoring companies will tell you when you’ve hit a trap. Sure I know.. that's why I'm asking what is the network. If someone sells

Re: [mailop] Hat color of list washers / validators

> On Mar 7, 2018, at 12:12 PM, Stefano Bagnara wrote: > > On 7 March 2018 at 20:25, David Carriger > wrote: >> In the worst examples I've seen, the domain went from a legitimate mail >> server to a trap network in the same day, with no time for

Re: [mailop] Hat color of list washers / validators

Original Message- From: mailop <mailop-boun...@mailop.org> On Behalf Of Stefano Bagnara Sent: Wednesday, March 7, 2018 12:12 PM To: Aaron C. de Bruyn via mailop <mailop@mailop.org> Subject: Re: [mailop] Hat color of list washers / validators On 7 March 2018 at 20:25,

Re: [mailop] Hat color of list washers / validators

On 7 March 2018 at 20:25, David Carriger wrote: > In the worst examples I've seen, the domain went from a legitimate mail > server to a trap network in the same day, with no time for bounces in > between. Are you 100% sure? Which trap network? How did you find it

Re: [mailop] Hat color of list washers / validators

Has Been Processed." > Got the Junk Mail Reporting Tool ? > > From: mailop <mailop-boun...@mailop.org> On Behalf Of David Carriger > Sent: Wednesday, March 7, 2018 11:26 AM > To: Brett Schenker <bhschen...@gmail.com>; Aaron C. de Bruyn via mailop > <mailop@ma

Re: [mailop] Hat color of list washers / validators

> Sent: Wednesday, March 7, 2018 11:41:55 AM > To: Aaron C. de Bruyn via mailop > Subject: Re: [mailop] Hat color of list washers / validators > > I work in the nonprofit/political space and while I can see uses to make sure > offline email list building (think people on

Re: [mailop] Hat color of list washers / validators

n-us/download/details.aspx?id=18275> ? From: mailop <mailop-boun...@mailop.org> On Behalf Of David Carriger Sent: Wednesday, March 7, 2018 11:26 AM To: Brett Schenker <bhschen...@gmail.com>; Aaron C. de Bruyn via mailop <mailop@mailop.org> Subject: Re: [mailop] Hat color

Re: [mailop] Hat color of list washers / validators

Subject: Re: [mailop] Hat color of list washers / validators I work in the nonprofit/political space and while I can see uses to make sure offline email list building (think people on a corner asking you to sign up/sign a petition) has had the addresses typed in correctly, list washin

Re: [mailop] Hat color of list washers / validators

Reporting Tool<http://www.microsoft.com/en-us/download/details.aspx?id=18275> ? From: mailop <mailop-boun...@mailop.org> On Behalf Of Brett Schenker Sent: Wednesday, March 7, 2018 10:42 AM To: Aaron C. de Bruyn via mailop <mailop@mailop.org> Subject: Re: [mailop] Hat color of list

Re: [mailop] Hat color of list washers / validators

I work in the nonprofit/political space and while I can see uses to make sure offline email list building (think people on a corner asking you to sign up/sign a petition) has had the addresses typed in correctly, list washing/validating is unfortunately being used by more orgs and campaigns as a

Re: [mailop] Hat color of list washers / validators

> >> 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. > > I'm not really familiar with their revenue model but I do know that for > some of them, spammers

Re: [mailop] Hat color of list washers / validators

On Wed, 2018-03-07 at 12:31 +, Benjamin BILLON wrote: > 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.

Re: [mailop] Hat color of list washers / validators

On 7 March 2018 at 13:20, Ken O'Driscoll via mailop wrote: > There are some industries where offline data acquisition is the norm and > validation is seen as part of the data quality process. "norm" is not so good as a "valid" reason: - what's the point of *validation* for

Re: [mailop] Hat color of list washers / validators

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: mailop@mailop.org Subject: Re: [mailop] Hat color

Re: [mailop] Hat color of list washers / validators

On Wed, 2018-03-07 at 11:21 +, 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

Re: [mailop] Hat color of list washers / validators

g] On Behalf Of Stefano Bagnara Sent: Wednesday, 7 March, 2018 17:13 To: mailop <mailop@mailop.org> Subject: Re: [mailop] Hat color of list washers / validators On 2 March 2018 at 21:45, John Johnstone <jjohnstone-mai...@tridentusa.com> wrote: > [...] > It seems somebody gave some

Re: [mailop] Hat color of list washers / validators

On 2 March 2018 at 21:45, John Johnstone wrote: > [...] > It seems somebody gave some fairly purposeful thought into coming up with > the algorithms to generate these. I'm curious to know what peoples thinking > is as to the hat color of these attempts.

[mailop] Hat color of list washers / validators

The list washers / validators must be doing a brisk business today. Many use Amazon hosting in what seems to be an attempt to evade blocking by IP. Aside from the simple attempts I see some that are trying things like: j...@domain.tld john@domain.tld jon@domain.tld