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AbuseIPDB » 77.81.121.253

77.81.121.253 was found in our database!

This IP was reported 21 times. Confidence of Abuse is 29%: ?

29%

ISP	KnownSRV Ltd.
Usage Type	Data Center/Web Hosting/Transit
ASN	AS200514
Domain Name	knownsrv.com
Country	🇳🇱 Netherlands
City	Roosendaal, North Brabant

IP info including ISP, Usage Type, and Location provided by IPInfo. Updated weekly.

Report 77.81.121.253

Whois 77.81.121.253

IP Abuse Reports for 77.81.121.253:

This IP address has been reported a total of 21 times from 14 distinct sources. 77.81.121.253 was first reported on August 15th 2023, and the most recent report was 7 hours ago.

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	2026-06-10 13:14:26 (7 hours ago)	NOQUEUE - IP: 77.81.121.253 - Jun 10 15:14:26 plesk postfix/smtpd[1623281]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 77.81.121.253 - Jun 10 15:14:26 plesk postfix/smtpd[1623281]: NOQUEUE: reject: RCPT from unknown[77.81.121.253]: 554 5.7.1 Service unavailable; Client host [77.81.121.253] blocked using dnsbl-1.uceprotect.net; IP 77.81.121.253 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=77.81.121.253; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<77-81-121-253.cprapid.com> show less	Email Spam
🇩🇪 DocNetzwerk	2026-06-08 00:42:49 (2 days ago)	(smtp-25-to-rcpt-from-2007-leak) Recipient address has been leaked in 2007 77.81.121.253 (-)	Hacking
🇨🇭 Origon	2026-06-07 11:06:08 (3 days ago)	NOQUEUE - IP: 77.81.121.253 - Jun 7 13:06:08 plesk postfix/smtpd[579684]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 77.81.121.253 - Jun 7 13:06:08 plesk postfix/smtpd[579684]: NOQUEUE: reject: RCPT from unknown[77.81.121.253]: 554 5.7.1 Service unavailable; Client host [77.81.121.253] blocked using dnsbl-1.uceprotect.net; IP 77.81.121.253 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=77.81.121.253; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<77-81-121-253.cprapid.com> show less	Email Spam
🇨🇭 Origon	2026-06-07 09:04:33 (3 days ago)	NOQUEUE - IP: 77.81.121.253 - Jun 7 11:04:33 plesk postfix/smtpd[438963]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 77.81.121.253 - Jun 7 11:04:33 plesk postfix/smtpd[438963]: NOQUEUE: reject: RCPT from unknown[77.81.121.253]: 554 5.7.1 Service unavailable; Client host [77.81.121.253] blocked using dnsbl-1.uceprotect.net; IP 77.81.121.253 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=77.81.121.253; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<77-81-121-253.cprapid.com> show less	Email Spam
🇸🇪 triplecode	2026-05-17 05:28:32 (3 weeks ago)	Reported from hMailServer	Email Spam
🇩🇪 H. Hampel	2026-05-15 07:22:52 (3 weeks ago)	Spam.	Email Spam
🇫🇷 smtp.com.es	2026-05-04 10:03:30 (1 month ago)	Brute force attempt.	Brute-Force Email Spam
🇳🇱 Cloud86 B.V.	2026-04-17 05:39:11 (1 month ago)	categories: Email Spam	Email Spam
🇨🇭 Origon	2026-04-17 02:38:53 (1 month ago)	NOQUEUE - IP: 77.81.121.253 - Apr 17 04:38:52 plesk postfix/smtpd[1028686]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 77.81.121.253 - Apr 17 04:38:52 plesk postfix/smtpd[1028686]: NOQUEUE: reject: RCPT from unknown[77.81.121.253]: 554 5.7.1 Service unavailable; Client host [77.81.121.253] blocked using dnsbl-1.uceprotect.net; IP 77.81.121.253 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=77.81.121.253; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<77-81-121-253.cprapid.com> show less	Email Spam
🇫🇷 smtp.com.es	2026-04-10 08:20:16 (2 months ago)	Brute force attempt.	Brute-Force Email Spam
Anonymous	2026-03-01 18:05:26 (3 months ago)	SMTP scanner - relay access denied	Brute-Force Exploited Host
🇨🇿 janekCZ	2025-12-07 20:52:22 (6 months ago)	Fail2Ban report from jail 'postfix': 2025-12-07T21:52:21.934273+01:00 mail postfix/smtpd[588814]: NO ... show more Fail2Ban report from jail 'postfix': 2025-12-07T21:52:21.934273+01:00 mail postfix/smtpd[588814]: NOQUEUE: reject: RCPT from unknown[77.81.121.253]: 554 5.7.1 <77-81-121-253.cprapid.com>: Helo command rejected: ACCESS DENIED. Your email was rejected because the sending mail server appears to be on a dynamic IP address that should not be doing direct mail delivery (77-81-121-253); from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<77-81-121-253.cprapid.com> ... show less	Brute-Force SSH
Anonymous	2025-12-03 05:11:00 (6 months ago)	[03/Dec/2025 00:57:47] Message rejected as spam with score: 9.54, threshold 6.30, From: barbara@auto ... show more [03/Dec/2025 00:57:47] Message rejected as spam with score: 9.54, threshold 6.30, From: [email protected], Sender IP: 77.81.121.253, Subject: spende..., Message size: 5058 show less	Web Spam Email Spam Spoofing
🇩🇪 0x44	2025-12-02 22:01:43 (6 months ago)	02/Dec/2025 * Malicious Spam - Flood ...	Email Spam Brute-Force
🇯🇵 Kinsei Engineering Inc.	2025-11-29 03:09:00 (6 months ago)	Postfix,Possible SPAM, Postscreen, Received incorrect commands at a high frequency.	Email Spam Brute-Force

Showing 1 to 15 of 21 reports

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