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MainSleaze Companies that spam, and ESPs that help them. RSS Feed About this Blog Mitä mainsleaze-roskaposti on? (fi) What is Mainsleaze Spam? The FAQs The FAQs In English FAQ: Why won’t you tell us what email address was spammed? FAQ: Why are you doing this? FAQ: What can I do with the information in these blogs? FAQ: But I didn’t mean to spam! What should I do? The FAQs in Finnish FAQ (fi): Miksi ette kerro, mihin osoitteisiin roskaposti tuli? The Bloggers Contacts Mar 01 February 2024 in Spamtraps: ESPs So here, at long last, the monthly stats for ESPs in the Koli-Lõks OÜ spamtrap collection. The percentage of ESP spam out of all email received was 13.9%. Figure 1. ESP spam in Koli-Lõks OÜ spamtraps, February 2024 Or, to put the same in readable text, # Name Percentage Most prominent customer Notes 0 (All others) 33.8% 1 SendGrid 18.8% infotimes.com.tw 2 Salesforce Marketing Cloud 14.6% Sam’s Club 3 Amazon SES 6.0% Terrie O’Connor Realtors 4 Intuit Mailchimp 5.8% citistore.com.hk 5 Emarsys 4.5% Costco Wholesale (UK) 6 MessageBird SparkPost 4.3% Best Target Advertising Ltd (IE) 7 Sinch Mailgun 4.0% Pandora 8 SendCloud (uCloud) 3.1% f-avis.top Newcomer in these postings 9 Mapp 2.7% nextwebbusinessguide.com Includes eCircle and Blue Hornet 10 ActiveCampaign 2.4% wrenews.com Table 1. List of the most frequently seen ESPs. The last time SendGrid was NOT number 1 in these stats was May 2021. Incidentally, that’s the previous time this blog was updated. Amazon SES has more or less permanently taken over from Mailchimp as #3. The entry of the Chinese ESP SendCloud / uCloud to these lists did in fact happen earlier, but it seems we’ve only tweeted about that at the time. Here’s a list of the individual customers with the most volume from the whole bunch, their percentages out of the total ESP mail load, their respective ESPs, and their percentages out of their own ESP: # Customer name Pct out of total ESP mail On which ESP Pct out of own ESP Name 1 infotimes.com.tw 2% SendGrid 10.9% 時報資訊股份有限公司 2 viaggioas.com 1% SparkPost 23.4% Best Target Advertising Ltd, Ireland 3 nextdoor.com 0.7% SendGrid 3.8% Nextdoor 4 lager157.com 0.7% SendGrid 3.7% Lager 157 5 tocr.com 0.6% Amazon SES 10.3% Terrie O’Connor Realtors 6 nrsc.org 0.6% SendGrid 3.1% National Republican Senatorial Committee 7 uber.com 0.4% SendGrid 2.3% Uber 8 samsclub.com 0.3% SFMC 2.3% Sam’s Club 9 costco.co.uk 0.3% Emarsys 7.3% Costco Wholesale (UK) 10 italotreno.it 0.3% Adobe Marketo 14.2% Italo, Italy’s high speed train Table 2. List of the most frequently seen ESP customers. You know where to reach us if you want to ask questions about this (that is, in case you don’t want it discussed in public in the comments to the blog). TTFN! Posted on March 1st, 2024 Posted by InfiniteMho No Comment » Filed under: ESP Problem Tags: meta , statistics Mar 01 Apologies for the long absence We’ve been active, but Atro has mostly been posting on LinkedIn . It’s somewhat easier than using the blog platform. But since we keep hearing it from you that new employees at ESPs are frequently advised to keep an eye on this blog by their more experienced colleagues, let’s try to make an effort here and justify that advice. Posted on March 1st, 2024 Posted by InfiniteMho No Comment » Filed under: Other Issues Tags: Jun 01 May 2021 in Spamtraps: ESPs Figure 1. Top 10 ESPs in our spamtraps, May 2021 Here’s a monthly summary of our findings in May 2021. Because of a major glitch at an otherwise unremarkable operator the total of ESP mail is noticeably larger than the month before (from 6.6% to 6.8%), the top 10 has a new participant that would never appear on the list otherwise, and the share of the top 10 out of everything is much larger than usual. Rating Participant Percentage Notes Most prominent customer 0 All others 33.2% 1 Salesforce Marketing Cloud 14.1% Marcus & Millichap (4%) 2 SendGrid 13.9% Uber (7.2%) 3 Retarus 12.0% Mostly backscatter MAILER-DAEMON (99%) 4 Mailchimp 8.0% Egyeditermekek.net (0.9%) 5 Amazon SES 5.7% Netflix (9.3%) 6 Oracle Marketing Cloud 3.2% Harborfreight.com (3.5%) 7 Epsilon 3.0% DICK’S Sporting Goods, Inc. (57.5%) 8 Mailgun 2.9% With some spillover from Mailjet Harri.com (3.3%) 9 CheetahMail 2.1% Talbots.com (11.4%) 10 Constant Contact 2.0% Rentv.com (1.5%) Table 1. Top 10 ESPs in our spamtraps, May 2021, with their shares of the total and most prominent customers This month’s special feature is a flood of backscatter from Retarus, a German ESP whose presence in our traps is usually so insignificant that they’re not even in the top 40. Early this month, there were two outbursts of this activity, between 7 to 11 am UTC on May 3 and between 3 to 7 am UTC on May 6. It is only the second time that backscatter causes an ESP to make an appearance here, the first, if memory serves, having been Hobsons in July 2018. After taking a closer look last period, I noticed that our handling of the merged operations of Mailgun and Mailjet is somewhat wonky, which explains the appearance of any given customer on both at the same time. To be honest, it doesn’t help that they appear to be borrowing IP blocks from each other. But this is a problem that I expect will resolve itself in the short to medium term as the merger is eventually completed (one hopes, anyway). Posted on June 1st, 2021 Posted by InfiniteMho No Comment » Filed under: ESP Problem , Spam Report Tags: meta , statistics May 08 First third of 2021 in Spamtraps: ESPs Once again, a trendline post. The percentages of ESP mail from all spam the traps saw was more or less 6.6% across the entire period, with slight variations. Figure 1. ESP spam in Koli-Lõks OÜ spamtraps, January to April 2021 The top contenders continue to remain all alone in their heights. Any interesting movements are occurring in the #5 to #15 slots. Mailgun showed absolute growth in numbers across the entire period and finally surpassed OMC in April. From February on, this is due to a collections agency in the UK, it seems. Epsilon’s trend is also consistently upward. DICK’S Sporting Goods, Inc. is responsible for half of what they send to us. Finally, Mailjet took a huge leap in April compared to the rest of the observation period. Interestingly enough, their worst customer is the same as that of Mailgun – a collection agency in the United Kingdom. Not only the same kind of, but actually the same domain names. Posted on May 8th, 2021 Posted by InfiniteMho No Comment » Filed under: Other Issues Tags: Jan 02 December 2020 in Spamtraps: ESPs Figure 1. ESP spam in spamtraps, December 2020 Okay, so here’s the last post of 2020, a day or two late. It really seems as if the SendGrid flood that there was during the autumn is over. There’s still a lot of mail, and some of it is still stuff that no ESP customer should be sending, but the numbers are more or less back to normal, which is nice. RATING PARTICIPANT PERCENTAGE NOTES MOST PROMINENT CUSTOMER 0 All others 33.9% 259 ESPs identified 1 Salesforce Marketing Cloud 15.6% Marcus & Millichap (3.5%) 2 SendGrid 13.8% Uber (7.0%) 3 Mailchimp 8.7% Spamtrap bias showing Akcióbazár (1%) 4 Amazon SES 6.3% Netflix (4.9%) 5 Oracle Marketing Cloud 4.2% harborfreight.com (3.7%) 6 Adobe Campaign 3.9% Pandora ( 49% ) 7 SendinBlue 3.0% sneakyaffiliate.com (10%) 8 Epsilon 2.9% DICK’S Sporting Goods ( 40% ) 9 CheetahMail 2.9% Talbots (7.7%) 10 Mailgun 2.7% Vumedi.com (3.3%) Table 1. Top 10 ESPs in our spamtraps, December 2020, with their shares of the total and most prominent customers We’ve done something strange, or spammers have done something strange, I don’t know. The proportion of ESP spam to all spam we’ve seen keeps growing. The numbers remain more or less the same, while the total goes down, so I guess either the botnets are spewing less, or we’re ignoring them better. The percentage of ESP spam to all was a whopping 8.1% this month. Then there’s the relative badness. Figure 2. Relative badness of ESPs in our spamtraps, December 2020 As always,...