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AbuseIPDB » 104.171.28.16

104.171.28.16 was found in our database!

This IP was reported 16 times. Confidence of Abuse is 27%: ?

27%

ISP	Dot Holding, Inc.
Usage Type	Fixed Line ISP
ASN	AS7029
Hostname(s)	prd-bd-UDLFIN.fastemailclean.com
Domain Name	dotology.com
Country	🇺🇸 United States of America
City	Leesburg, Virginia

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

Report 104.171.28.16

Whois 104.171.28.16

IP Abuse Reports for 104.171.28.16:

This IP address has been reported a total of 16 times from 8 distinct sources. 104.171.28.16 was first reported on January 25th 2025, and the most recent report was 22 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	2026-06-20 19:51:21 (22 hours ago)	NOQUEUE - IP: 104.171.28.16 - Jun 20 21:51:21 plesk postfix/smtpd[2646256]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 104.171.28.16 - Jun 20 21:51:21 plesk postfix/smtpd[2646256]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean.com[104.171.28.16]: 554 5.7.1 Service unavailable; Client host [104.171.28.16] blocked using dnsbl-2.uceprotect.net; Net 104.171.24.0/21 is UCEPROTECT-Level2 listed because 311 impacts are seen from WINDSTREAM, US/AS7029 there. See: http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16 / Net 104.171.28.0/22 is UCEPROTECT-Level2 listed because 311 impacts are seen from WINDSTREAM, US/AS7029 there. See: http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<prd-bd-UDLFIN.fastemailclean.com> show less	Email Spam
🇩🇪 ksol-hostmaster	2026-06-20 08:36:16 (1 day ago)	Jun 20 10:36:15 ksol postfix/postscreen[21099]: NOQUEUE: reject: RCPT from [104.171.28.16]:43071: 55 ... show more Jun 20 10:36:15 ksol postfix/postscreen[21099]: NOQUEUE: reject: RCPT from [104.171.28.16]:43071: 550 5.7.1 Service unavailable; client [104.171.28.16] blocked using zen.spamhaus.org; from=<anonymized@email>, to=<anonymized@email>, proto=ESMTP, helo=<prd-bd-UDLFIN.fastemailclean.com> ... show less	Email Spam
🇨🇭 Origon	2026-06-10 17:08:19 (1 week ago)	NOQUEUE - IP: 104.171.28.16 - Jun 10 19:08:19 plesk postfix/smtpd[1954262]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 104.171.28.16 - Jun 10 19:08:19 plesk postfix/smtpd[1954262]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean.com[104.171.28.16]: 554 5.7.1 Service unavailable; Client host [104.171.28.16] blocked using dnsbl-1.uceprotect.net; IP 104.171.28.16 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<prd-bd-UDLFIN.fastemailclean.com> show less	Email Spam
🇺🇸 DiodeDave	2026-06-10 13:07:15 (1 week ago)	Attempted access after blacklisting	Email Spam
🇨🇭 Origon	2026-06-07 14:35:04 (2 weeks ago)	NOQUEUE - IP: 104.171.28.16 - Jun 7 16:35:04 plesk postfix/smtpd[728651]: NOQUEUE: reject: RCPT fro ... show more NOQUEUE - IP: 104.171.28.16 - Jun 7 16:35:04 plesk postfix/smtpd[728651]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean.com[104.171.28.16]: 554 5.7.1 Service unavailable; Client host [104.171.28.16] blocked using dnsbl-1.uceprotect.net; IP 104.171.28.16 is UCEPROTECT-Level 1 listed. See http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<prd-bd-UDLFIN.fastemailclean.com> show less	Email Spam
🇷🇺 webserfer	2026-06-04 14:26:19 (2 weeks ago)	[f2b] smtp: denied by acl [W0:1:90d]	Email Spam Exploited Host
🇨🇭 Origon	2026-06-01 07:17:21 (2 weeks ago)	NOQUEUE - IP: 104.171.28.16 - Jun 1 09:17:20 plesk postfix/smtpd[2617399]: NOQUEUE: reject: RCPT fr ... show more NOQUEUE - IP: 104.171.28.16 - Jun 1 09:17:20 plesk postfix/smtpd[2617399]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean.com[104.171.28.16]: 554 5.7.1 Service unavailable; Client host [104.171.28.16] blocked using dnsbl-2.uceprotect.net; Net 104.171.28.0/22 is UCEPROTECT-Level2 listed because 67 impacts are seen from WINDSTREAM, US/AS7029 there. See: http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16 / Net 104.171.24.0/21 is UCEPROTECT-Level2 listed because 71 impacts are seen from WINDSTREAM, US/AS7029 there. See: http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16; from=<[email protected]> to=<REDACTED@REDACTED> proto=ESMTP helo=<prd-bd-UDLFIN.fastemailclean.com> show less	Email Spam
🇨🇭 Origon	2025-12-28 09:17:40 (5 months ago)	NOQUEUE - IP: 104.171.28.16 - Dec 28 10:17:40 plesk postfix/smtpd[1819087]: NOQUEUE: reject: RCPT f ... show more NOQUEUE - IP: 104.171.28.16 - Dec 28 10:17:40 plesk postfix/smtpd[1819087]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean.com[104.171.28.16]: 554 5.7.1 Service unavailable; Client host [104.171.28.16] blocked using dnsbl-2.uceprotect.net; Net 104.171.28.0/22 is UCEPROTECT-Level2 listed because 259 impacts are seen from WINDSTREAM, US/AS7029 there. See: http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16 / Net 104.171.24.0/21 is UCEPROTECT-Level2 listed because 259 impacts are seen from WINDSTREAM, US/AS7029 there. See: http://www.uceprotect.net/rblcheck.php?ipr=104.171.28.16; from=<[email protected]> to=<REDACTED@REDACTED> proto=SMTP helo=<prd-bd-UDLFIN.fastemailclean.com> show less	Email Spam
🇩🇪 WhiteShark	2025-12-13 17:07:14 (6 months ago)	fastemailclean.com blocked due to abusive behavior	Brute-Force
🇩🇪 WhiteShark	2025-10-23 00:25:50 (7 months ago)	fastemailclean.com blocked due to abusive behavior, count=2 for IP 104.171.28.16	Brute-Force
🇩🇪 WhiteShark	2025-09-29 08:50:29 (8 months ago)	fastemailclean.com blocked due to abusive behavior	Brute-Force
🇩🇪 WhiteShark	2025-07-21 00:36:12 (11 months ago)	fastemailclean.com blocked due to abusive behavior	Brute-Force
🇪🇸 didevi	2025-06-14 06:07:37 (1 year ago)	SPAM or Brute force attack detected	Email Spam Brute-Force
🇬🇧 Hobby Bob	2025-02-24 17:35:46 (1 year ago)	Feb 24 17:35:46 mail postfix/smtpd[389664]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean. ... show more Feb 24 17:35:46 mail postfix/smtpd[389664]: NOQUEUE: reject: RCPT from prd-bd-UDLFIN.fastemailclean.com[104.171.28.16]: 554 5.7.1 Service unavailable; Client host [104.171.28.16] blocked using zen.spamhaus.org; Listed by SBL, see https://check.spamhaus.org/sbl/query/SBL639941 / Listed by CSS, see https://check.spamhaus.org/query/ip/104.171.28.16; from= to= proto=SMTP helo= show less	Email Spam
🇩🇪 WhiteShark	2025-02-20 09:24:50 (1 year ago)	fastemailclean.com blocked due to abusive behavior	Brute-Force

Showing 1 to 15 of 16 reports

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