This IP address has been reported a total of
5,215
times from
409 distinct
sources.
178.16.54.237 was first reported on
, and the most recent report was
.
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.
<redacted>: Helo command rejected: need fully-qualified hostname; from=<redacted> to=<redacted> prot ...
show more<redacted>: Helo command rejected: need fully-qualified hostname; from=<redacted> to=<redacted> proto=ESMTP helo=<redacted>
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Domain : tiscali.it
Rule : SMTP
04/17/26 12:05:40 2296 178.16.54.237 220 Hosgediniz 16 0
04/17/ ...
show moreDomain : tiscali.it
Rule : SMTP
04/17/26 12:05:40 2296 178.16.54.237 220 Hosgediniz 16 0
04/17/26 12:05:41 2296 178.16.54.237 EHLO ehlo 178-16-54-237 ***hidden-privacy*** [178.16.54.237], this server offers 5 extensions 171 20
04/17/26 12:05:41 2296 178.16.54.237 RSET Rset 250 Requested mail action okay, completed 43 6
04/17/26 12:05:41 2296 178.16.54.237 MAIL Mail from:<[email protected]> 250 Requested mail action okay, completed 43 32
04/17/26 12:05:41 2296 178.16.54.237 RCPT RCPT to:<[email protected]> 503 This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server. 235 30
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Apr 17 00:40:22 s03d9 postfix/smtpd[1496145]: disconnect from unknown[178.16.54.237] ehlo=1 mail=1 r ...
show moreApr 17 00:40:22 s03d9 postfix/smtpd[1496145]: disconnect from unknown[178.16.54.237] ehlo=1 mail=1 rcpt=0/1 rset=1 quit=1 commands=4/5
...
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Suricata Detected 2 attacks from 178.16.54.237.; ET DROP Spamhaus DROP Listed Traffic Inbound group ...
show moreSuricata Detected 2 attacks from 178.16.54.237.; ET DROP Spamhaus DROP Listed Traffic Inbound group 35; IP: 178.16.54.237; Ports: 53477; Direction: to_server; Trigger: DROP; Category: Misc Attack; Severity: 2
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(PERMBLOCK) 178.16.54.237 (NL/The Netherlands/North Holland/Amsterdam/-/[redacted]) has had more tha ...
show more(PERMBLOCK) 178.16.54.237 (NL/The Netherlands/North Holland/Amsterdam/-/[redacted]) has had more than 2 temp blocks
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(smtpauth) Failed SMTP AUTH login from 178.16.54.237 (NL/The Netherlands/North Holland/Amsterdam/-/[ ...
show more(smtpauth) Failed SMTP AUTH login from 178.16.54.237 (NL/The Netherlands/North Holland/Amsterdam/-/[redacted])
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Brute-Force
Anonymous
2026-04-15T07:36:20.744917+02:00 mx1 postfix/smtpd[2220189]: NOQUEUE: reject: RCPT from unknown[178. ...
show more2026-04-15T07:36:20.744917+02:00 mx1 postfix/smtpd[2220189]: NOQUEUE: reject: RCPT from unknown[178.16.54.237]: 504 5.5.2 <178-16-54-237>: Helo command rejected: need fully-qualified hostname; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<178-16-54-237>
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