Total reports
4 from
1 distinct
reporter
First reported
September 27th 2026
Most recent report
4 hours ago
Last 60 days
Top reporter locations
🇨🇭
Switzerland
4
Most common categories
Email Spam
4
Recent reports
We have received reports of abusive activity from this IP address within the last week. It is
potentially still actively engaged in abusive activities.
Reporter
IoA Timestamp (UTC)
Comment
Categories
🇨🇭
Origon
2026-11-06 12:24:07
UTC ·
(4 hours ago)
NOQUEUE - IP: 91.241.75.27 - Nov 6 13:24:07 plesk postfix/smtpd[1440566]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; https://[site]/repu ...
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NOQUEUE - IP: 91.241.75.27 - Nov 6 13:24:07 plesk postfix/smtpd[1440566]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; https://[site]/reputation/?pr=1&ip=91.241.75.27; from=<[email protected] > to=<[customer]> proto=ESMTP helo=<mail24-27.srv2.de>
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Email Spam
🇨🇭
Origon
2026-10-18 10:07:38
UTC ·
(2 weeks ago)
NOQUEUE - IP: 91.241.75.27 - Oct 18 12:07:38 plesk postfix/smtpd[1951242]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; http://www.barracu ...
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NOQUEUE - IP: 91.241.75.27 - Oct 18 12:07:38 plesk postfix/smtpd[1951242]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=91.241.75.27; from=<[email protected] > to=<REDACTED@REDACTED> proto=ESMTP helo=<mail24-27.srv2.de>
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Email Spam
🇨🇭
Origon
2026-10-01 17:35:03
UTC ·
(1 month ago)
NOQUEUE - IP: 91.241.75.27 - Oct 1 19:35:03 plesk postfix/smtpd[2593193]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; http://www.barracud ...
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NOQUEUE - IP: 91.241.75.27 - Oct 1 19:35:03 plesk postfix/smtpd[2593193]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=91.241.75.27; from=<[email protected] > to=<REDACTED@REDACTED> proto=ESMTP helo=<mail24-27.srv2.de>
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Email Spam
🇨🇭
Origon
2026-09-27 08:34:15
UTC ·
(1 month ago)
NOQUEUE - IP: 91.241.75.27 - Sep 27 10:34:15 plesk postfix/smtpd[3582905]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; http://www.barracu ...
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NOQUEUE - IP: 91.241.75.27 - Sep 27 10:34:15 plesk postfix/smtpd[3582905]: NOQUEUE: reject: RCPT from mail24-27.srv2.de[91.241.75.27]: 554 5.7.1 Service unavailable; Client host [91.241.75.27] blocked using b.barracudacentral.org; http://www.barracudanetworks.com/reputation/?pr=1&ip=91.241.75.27; from=<[email protected] > to=<REDACTED@REDACTED> proto=ESMTP helo=<mail24-27.srv2.de>
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Email Spam
