This IP address has been reported a total of
810
times from
252 distinct
sources.
91.92.242.72 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.
Mar 20 05:05:32 server postfix/smtpd[1996816]: warning: unknown[91.92.242.72]: SASL LOGIN authentica ...
show moreMar 20 05:05:32 server postfix/smtpd[1996816]: warning: unknown[91.92.242.72]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 20 05:05:46 server postfix/smtpd[1996818]: warning: unknown[91.92.242.72]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 20 05:05:58 server postfix/smtpd[1996687]: warning: unknown[91.92.242.72]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
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Mar 20 05:05:32 server postfix/smtpd[1996816]: warning: unknown[91.92.242.72]: SASL LOGIN authentica ...
show moreMar 20 05:05:32 server postfix/smtpd[1996816]: warning: unknown[91.92.242.72]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 20 05:05:46 server postfix/smtpd[1996818]: warning: unknown[91.92.242.72]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 20 05:05:58 server postfix/smtpd[1996687]: warning: unknown[91.92.242.72]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
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SMTP brute-force attack on mail server (Postfix/Plesk). 0 failed authentication attempt(s) in 168h ( ...
show moreSMTP brute-force attack on mail server (Postfix/Plesk). 0 failed authentication attempt(s) in 168h (since 2026-04-09 12:17). Detected by Fail2Ban jail "plesk-postfix" on mercurius-guide.com.
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2026-04-14T18:43:41.594289+08:00 Nebula postfix/smtpd[147218]: lost connection after CONNECT from un ...
show more2026-04-14T18:43:41.594289+08:00 Nebula postfix/smtpd[147218]: lost connection after CONNECT from unknown[91.92.242.72]
2026-04-14T18:43:42.182599+08:00 Nebula postfix/smtpd[147220]: NOQUEUE: reject: RCPT from unknown[91.92.242.72]: 450 4.7.25 Client host rejected: cannot find your hostname, [91.92.242.72]; from=<[email protected]> to=<[email protected]> proto=SMTP helo=<win-7n1fiecl6ic.domain>
2026-04-14T18:43:45.007827+08:00 Nebula postfix/smtpd[147220]: lost connection after RCPT from unknown[91.92.242.72]
...
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