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170.203.28.5

Recent Activity

Abuse confidence score ?

35% Elevated

61 reports

7 reporters · latest 1 day ago

ISP	Klaviyo, Inc
Usage Type	Data Center/Web Hosting/Transit
ASN	AS14618
Hostname(s)	kl-203-28-5.kmta.shared.klaviyomail.com
Domain Name	klaviyo.com
Country	🇺🇸 United States of America
City	Boston, Massachusetts

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IP Abuse Reports for 170.203.28.5

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This IP address has been reported a total of 61 times from 7 distinct sources. 170.203.28.5 was first reported on February 6th 2024, and the most recent report was 1 day ago. In the last 60 days, the top reporter locations were: Switzerland with 8 reports; United States of America with 8 reports; Canada with 1 report. The only category in these recent reports was: Email Spam 18 times.

Reporter	IoA Timestamp (UTC)	Comment	Categories
🇨🇭 Mario Bretscher	2026-10-23 08:04:44 (1 day ago)	2026-10-23T10:04:43.205267+02:00 hades postfix/smtpd[3832584]: NOQUEUE: reject: RCPT from kl-203-28- ... show more 2026-10-23T10:04:43.205267+02:00 hades postfix/smtpd[3832584]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using hostkarma.junkemailfilter.com; Black listed at hostkarma http://ipadmin.junkemailfilter.com/remove.php?ip=170.203.28.5; from=<bounce-kl_29112318985-kl_101101m5cjmhwrqs9rmw-h-ee3cc65f31=2@k3.news.easycosmetic.ch> to=<[email protected]> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> ... show less	Email Spam
🇨🇦 agogava	2026-10-22 17:51:52 (1 day ago)	Spam reported by OpenAI.	Email Spam
🇨🇭 Origon	2026-10-21 08:00:48 (3 days ago)	NOQUEUE - IP: 170.203.28.5 - Oct 21 10:00:48 plesk postfix/smtpd[2315968]: NOQUEUE: reject: RCPT fr ... show more NOQUEUE - IP: 170.203.28.5 - Oct 21 10:00:48 plesk postfix/smtpd[2315968]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using bl.0spam.org; Received: from kl-203-28-5.kmta.shared.klaviyomail.com (kl-203-28-5.kmta.shared.klaviyomail.com [170.203.28.5]) Mon, 28 Apr 2025 00:37:17 +0000 Subject: =?UTF-8?q?FLASH_SALE_Selk'bag_Lite_Only_170.203.28.599!_=F0=9F=A4=AD?=; from=<bounce-kl_29112318985-kl_101101m5efqw2g8r6vyg-h-1c51307553=2@k3.news.easycosmetic.ch> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> show less	Email Spam
🇸🇪 triplecode	2026-10-20 10:15:19 (4 days ago)	Reported from hMailServer	Email Spam
🇺🇸 xmission.com	2026-10-16 01:01:07 (1 week ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 25.3. Latest msgid suffix: ...1J ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 25.3. Latest msgid suffix: ...1JDPCVWMET show less	Email Spam
🇺🇸 xmission.com	2026-10-10 17:03:45 (1 week ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 29.6. Latest msgid suffix: ...G7 ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 29.6. Latest msgid suffix: ...G7TBVK5GT6 show less	Email Spam
🇺🇸 xmission.com	2026-10-08 01:45:42 (2 weeks ago)	Sourced 2 spam messages over 3x XMissions threshold. Highest score: 25.8. Latest msgid suffix: ...Z1 ... show more Sourced 2 spam messages over 3x XMissions threshold. Highest score: 25.8. Latest msgid suffix: ...Z1FH32YWSZ show less	Email Spam
🇨🇭 Origon	2026-10-05 17:28:24 (2 weeks ago)	NOQUEUE - IP: 170.203.28.5 - Oct 5 19:28:24 plesk postfix/smtpd[70667]: NOQUEUE: reject: RCPT from ... show more NOQUEUE - IP: 170.203.28.5 - Oct 5 19:28:24 plesk postfix/smtpd[70667]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using bl.0spam.org; Received: from kl-203-28-5.kmta.shared.klaviyomail.com (kl-203-28-5.kmta.shared.klaviyomail.com [170.203.28.5]) Mon, 28 Apr 2025 00:37:17 +0000 Subject: =?UTF-8?q?FLASH_SALE_Selk'bag_Lite_Only_170.203.28.599!_=F0=9F=A4=AD?=; from=<bounce-kl_27174808170-kl_101101m46gnv1pth756r-h-31c7adf1c0=2@k3.send.lunicora.shop> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> show less	Email Spam
🇨🇭 Origon	2026-10-02 16:32:09 (3 weeks ago)	NOQUEUE - IP: 170.203.28.5 - Oct 2 18:32:09 plesk postfix/smtpd[4179448]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 170.203.28.5 - Oct 2 18:32:09 plesk postfix/smtpd[4179448]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using bl.0spam.org; Received: from kl-203-28-5.kmta.shared.klaviyomail.com (kl-203-28-5.kmta.shared.klaviyomail.com [170.203.28.5]) Mon, 28 Apr 2025 00:37:17 +0000 Subject: =?UTF-8?q?FLASH_SALE_Selk'bag_Lite_Only_170.203.28.599!_=F0=9F=A4=AD?=; from=<bounce-kl_27908726610-kl_101101m3ynmcz33dqg4x-h-c1d2adec9a=2@k3.send.chris-farrell.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> show less	Email Spam
🇺🇸 xmission.com	2026-09-29 21:01:38 (3 weeks ago)	Sourced 7 spam messages over 3x XMissions threshold. Highest score: 30.2. Latest msgid suffix: ...FW ... show more Sourced 7 spam messages over 3x XMissions threshold. Highest score: 30.2. Latest msgid suffix: ...FWPZPS0QWK show less	Email Spam
🇺🇸 xmission.com	2026-09-28 21:47:32 (3 weeks ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 32.1. Latest msgid suffix: ...GT ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 32.1. Latest msgid suffix: ...GT7T5R87V7 show less	Email Spam
🇨🇭 Origon	2026-09-28 01:28:33 (3 weeks ago)	NOQUEUE - IP: 170.203.28.5 - Sep 28 03:28:33 plesk postfix/smtpd[253634]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 170.203.28.5 - Sep 28 03:28:33 plesk postfix/smtpd[253634]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using bl.0spam.org; Received: from kl-203-28-5.kmta.shared.klaviyomail.com (kl-203-28-5.kmta.shared.klaviyomail.com [170.203.28.5]) Mon, 28 Apr 2025 00:37:17 +0000 Subject: =?UTF-8?q?FLASH_SALE_Selk'bag_Lite_Only_170.203.28.599!_=F0=9F=A4=AD?=; from=<bounce-kl_22460245399-kl_101101m3jsjm0pxnxv3d-h-f761ecadb2=2@k3.send.thewebster.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> show less	Email Spam
🇺🇸 xmission.com	2026-09-25 17:35:59 (4 weeks ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.4. Latest msgid suffix: ...CM ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.4. Latest msgid suffix: ...CMYNBN433G show less	Email Spam
🇨🇭 Origon	2026-09-21 16:51:48 (1 month ago)	NOQUEUE - IP: 170.203.28.5 - Sep 21 18:51:48 plesk postfix/smtpd[3032246]: NOQUEUE: reject: RCPT fr ... show more NOQUEUE - IP: 170.203.28.5 - Sep 21 18:51:48 plesk postfix/smtpd[3032246]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using bl.0spam.org; Received: from kl-203-28-5.kmta.shared.klaviyomail.com (kl-203-28-5.kmta.shared.klaviyomail.com [170.203.28.5]) Mon, 28 Apr 2025 00:37:17 +0000 Subject: =?UTF-8?q?FLASH_SALE_Selk'bag_Lite_Only_170.203.28.599!_=F0=9F=A4=AD?=; from=<bounce-kl_21899849440-kl_101101m32dm7dad096s7-h-de0fabc1ba=2@k3.eml.indahclothing.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> show less	Email Spam
🇨🇭 Origon	2026-09-14 00:54:35 (1 month ago)	NOQUEUE - IP: 170.203.28.5 - Sep 14 02:54:35 plesk postfix/smtpd[4109208]: NOQUEUE: reject: RCPT fr ... show more NOQUEUE - IP: 170.203.28.5 - Sep 14 02:54:35 plesk postfix/smtpd[4109208]: NOQUEUE: reject: RCPT from kl-203-28-5.kmta.shared.klaviyomail.com[170.203.28.5]: 554 5.7.1 Service unavailable; Client host [170.203.28.5] blocked using bl.0spam.org; Received: from kl-203-28-5.kmta.shared.klaviyomail.com (kl-203-28-5.kmta.shared.klaviyomail.com [170.203.28.5]) Mon, 28 Apr 2025 00:37:17 +0000 Subject: =?UTF-8?q?FLASH_SALE_Selk'bag_Lite_Only_170.203.28.599!_=F0=9F=A4=AD?=; from=<bounce-kl_21899849440-kl_101101m2epaj2n458ezq-h-e47c785c8f=2@k3.eml.indahclothing.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-28-5.kmta.shared.klaviyomail.com> show less	Email Spam

Showing 1 to 15 of 61 reports

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