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170.203.16.34

Recent Activity

Abuse confidence score ?

28% Elevated

65 reports

10 reporters · latest 2 days ago

ISP	Klaviyo, Inc
Usage Type	Data Center/Web Hosting/Transit
ASN	AS14618
Hostname(s)	kl-203-16-34.kmta.shared.klaviyomail.com
Domain Name	klaviyo.com
Country	🇺🇸 United States of America
City	Boston, Massachusetts

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IP Abuse Reports for 170.203.16.34

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This IP address has been reported a total of 65 times from 10 distinct sources. 170.203.16.34 was first reported on May 27th 2024, and the most recent report was 2 days ago. In the last 60 days, the top reporter locations were: United States of America with 14 reports; Switzerland with 5 reports; Finland with 1 report. The only category in these recent reports was: Email Spam 21 times.

Reporter	IoA Timestamp (UTC)	Comment	Categories
Anonymous	2026-10-05 14:14:00 (2 days ago)	E-mail spam at 2026-10-05 14:14 from @k3.news.watc-studio.com with score 9	Email Spam
🇺🇸 xmission.com	2026-10-05 01:22:28 (3 days ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 25.2. Latest msgid suffix: ...43 ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 25.2. Latest msgid suffix: ...4358P3EWN6 show less	Email Spam
🇺🇸 xmission.com	2026-10-04 09:02:34 (4 days ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 25.8. Latest msgid suffix: ...XJ ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 25.8. Latest msgid suffix: ...XJE43114PT show less	Email Spam
🇨🇭 Origon	2026-10-03 07:30:15 (5 days ago)	NOQUEUE - IP: 170.203.16.34 - Oct 3 09:30:15 plesk postfix/smtpd[953391]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 170.203.16.34 - Oct 3 09:30:15 plesk postfix/smtpd[953391]: NOQUEUE: reject: RCPT from kl-203-16-34.kmta.shared.klaviyomail.com[170.203.16.34]: 554 5.7.1 Service unavailable; Client host [170.203.16.34] blocked using bl.0spam.org; Received: from kl-203-16-34.kmta.shared.klaviyomail.com (kl-203-16-34.kmta.shared.klaviyomail.com [170.203.16.34]) Fri, 12 Sep 2025 16:00:41 +0000 Subject: =?UTF-8?q?=E2=9A=A1Harvest_Fast_This_Fall?=; from=<bounce-kl_26792081257-kl_101101m3yf0f0yfnedpr-h-489abc03a4=2@k3.e.orifuture.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-16-34.kmta.shared.klaviyomail.com> show less	Email Spam
🇺🇸 xmission.com	2026-09-29 21:00:56 (1 week ago)	Sourced 3 spam messages over 3x XMissions threshold. Highest score: 31.2. Latest msgid suffix: ...TV ... show more Sourced 3 spam messages over 3x XMissions threshold. Highest score: 31.2. Latest msgid suffix: ...TV03AXWVHG show less	Email Spam
🇨🇭 Origon	2026-09-24 02:35:12 (2 weeks ago)	NOQUEUE - IP: 170.203.16.34 - Sep 24 04:35:12 plesk postfix/smtpd[2869243]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 170.203.16.34 - Sep 24 04:35:12 plesk postfix/smtpd[2869243]: NOQUEUE: reject: RCPT from kl-203-16-34.kmta.shared.klaviyomail.com[170.203.16.34]: 554 5.7.1 Service unavailable; Client host [170.203.16.34] blocked using bl.0spam.org; Received: from kl-203-16-34.kmta.shared.klaviyomail.com (kl-203-16-34.kmta.shared.klaviyomail.com [170.203.16.34]) Fri, 12 Sep 2025 16:00:41 +0000 Subject: =?UTF-8?q?=E2=9A=A1Harvest_Fast_This_Fall?=; from=<bounce-kl_26165262976-kl_101101m38knhbd8t4ckr-h-f5f538c5ef=2@k3.send.vaquitathelabel.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-16-34.kmta.shared.klaviyomail.com> show less	Email Spam
🇨🇭 Origon	2026-09-15 14:31:37 (3 weeks ago)	NOQUEUE - IP: 170.203.16.34 - Sep 15 16:31:37 plesk postfix/smtpd[2664613]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 170.203.16.34 - Sep 15 16:31:37 plesk postfix/smtpd[2664613]: NOQUEUE: reject: RCPT from kl-203-16-34.kmta.shared.klaviyomail.com[170.203.16.34]: 554 5.7.1 Service unavailable; Client host [170.203.16.34] blocked using bl.0spam.org; Received: from kl-203-16-34.kmta.shared.klaviyomail.com (kl-203-16-34.kmta.shared.klaviyomail.com [170.203.16.34]) Fri, 12 Sep 2025 16:00:41 +0000 Subject: =?UTF-8?q?=E2=9A=A1Harvest_Fast_This_Fall?=; from=<bounce-kl_27064900729-kl_101101m2j89mpd98fmy3-h-e926c5e9d1=2@send.ch.dancover.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-16-34.kmta.shared.klaviyomail.com> show less	Email Spam
🇨🇭 Origon	2026-09-13 07:30:09 (3 weeks ago)	NOQUEUE - IP: 170.203.16.34 - Sep 13 09:30:09 plesk postfix/smtpd[2967106]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 170.203.16.34 - Sep 13 09:30:09 plesk postfix/smtpd[2967106]: NOQUEUE: reject: RCPT from kl-203-16-34.kmta.shared.klaviyomail.com[170.203.16.34]: 554 5.7.1 Service unavailable; Client host [170.203.16.34] blocked using bl.0spam.org; Received: from kl-203-16-34.kmta.shared.klaviyomail.com (kl-203-16-34.kmta.shared.klaviyomail.com [170.203.16.34]) Fri, 12 Sep 2025 16:00:41 +0000 Subject: =?UTF-8?q?=E2=9A=A1Harvest_Fast_This_Fall?=; from=<bounce-kl_26792081257-kl_101101m2cmdx7t2vznq7-h-851b5148d1=2@k3.e.orifuture.com> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-16-34.kmta.shared.klaviyomail.com> show less	Email Spam
🇺🇸 xmission.com	2026-09-12 17:06:41 (3 weeks ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 31.4. Latest msgid suffix: ...PP ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 31.4. Latest msgid suffix: ...PPW4CVS6XR show less	Email Spam
🇨🇭 Origon	2026-09-08 13:10:09 (4 weeks ago)	NOQUEUE - IP: 170.203.16.34 - Sep 8 15:10:09 plesk postfix/smtpd[3607590]: NOQUEUE: reject: RCPT fr ... show more NOQUEUE - IP: 170.203.16.34 - Sep 8 15:10:09 plesk postfix/smtpd[3607590]: NOQUEUE: reject: RCPT from kl-203-16-34.kmta.shared.klaviyomail.com[170.203.16.34]: 554 5.7.1 Service unavailable; Client host [170.203.16.34] blocked using bl.0spam.org; Received: from kl-203-16-34.kmta.shared.klaviyomail.com (kl-203-16-34.kmta.shared.klaviyomail.com [170.203.16.34]) Fri, 12 Sep 2025 16:00:41 +0000 Subject: =?UTF-8?q?=E2=9A=A1Harvest_Fast_This_Fall?=; from=<bounce-kl_26090112030-kl_101101m0ywqh41rkshsr-h-d480f426e4=2@k3.send.snusexpress.ch> to=<REDACTED@REDACTED> proto=ESMTP helo=<kl-203-16-34.kmta.shared.klaviyomail.com> show less	Email Spam
🇺🇸 xmission.com	2026-09-06 13:31:12 (1 month ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 30.1. Latest msgid suffix: ...15 ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 30.1. Latest msgid suffix: ...15GKCFD795 show less	Email Spam
🇺🇸 xmission.com	2026-09-05 21:02:22 (1 month ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.8. Latest msgid suffix: ...KW ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.8. Latest msgid suffix: ...KW1DJM2378 show less	Email Spam
🇫🇮 MostHosted	2026-09-02 09:35:01 (1 month ago)	Spam Sender	Email Spam
🇺🇸 xmission.com	2026-08-30 01:01:04 (1 month ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.8. Latest msgid suffix: ...GC ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.8. Latest msgid suffix: ...GC7NTVHVN5 show less	Email Spam
🇺🇸 xmission.com	2026-08-29 01:00:32 (1 month ago)	Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.8. Latest msgid suffix: ...58 ... show more Sourced 1 spam messages over 3x XMissions threshold. Highest score: 27.8. Latest msgid suffix: ...58WQ3K5PN0 show less	Email Spam

Showing 1 to 15 of 65 reports

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