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grassau.com
2026-01-19 04:54:24
(5 months ago)
(smtpauth) Failed SMTP AUTH login from 223.245.218.4 (CN/China/-)
Brute-Force
๐ฉ๐ช
Benny Pedersen
2026-01-19 04:53:50
(5 months ago)
Jan 19 05:53:37 localhost postfix/smtpd[28129]: NOQUEUE: lost connection after AUTH from unknown[223 ...
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Jan 19 05:53:37 localhost postfix/smtpd[28129]: NOQUEUE: lost connection after AUTH from unknown[223.245.218.4]
Jan 19 05:53:38 localhost postfix/smtpd[28129]: NOQUEUE: lost connection after AUTH from unknown[223.245.218.4]
...
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Brute-Force
๐ฎ๐น
GV
2025-12-28 00:45:03
(6 months ago)
Fail2ban automated block: consistent brute force attempts detected in mail logs.
Brute-Force
SSH
Anonymous
2025-12-27 23:44:56
(6 months ago)
RdpGuard detected brute-force attempt on SMTP
Brute-Force
๐จ๐ฟ
Simpless Digital
2025-12-13 18:16:26
(7 months ago)
Dec 13 19:16:16 mail postfix/smtpd[21576]: warning: unknown[223.245.218.4]: SASL LOGIN authenticatio ...
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Dec 13 19:16:16 mail postfix/smtpd[21576]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure, [email protected]
Dec 13 19:16:19 mail postfix/smtpd[22131]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure, [email protected]
Dec 13 19:16:21 mail postfix/smtpd[22135]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure, [email protected]
Dec 13 19:16:24 mail postfix/smtpd[21564]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure, [email protected]
Dec 13 19:16:26 mail postfix/smtpd[22135]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure, [email protected]
...
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Brute-Force
๐จ๐ฟ
interconnect.cz
2025-11-26 06:00:04
(7 months ago)
[26/Nov/2025 06:58:00] SMTP Spam attack detected from 223.245.218.4, client closed connection before ...
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[26/Nov/2025 06:58:00] SMTP Spam attack detected from 223.245.218.4, client closed connection before SMTP greeting
[26/Nov/2025 06:59:41] SMTP Spam attack detected from 223.245.218.4, client closed connection before SMTP greeting
[26/Nov/2025 07:00:02] SMTP Spam attack detected from 223.245.218.4, client closed connection before SMTP greeting
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Email Spam
Brute-Force
๐จ๐ฟ
Countryman
2025-11-15 06:30:51
(8 months ago)
repeated unauthorized connection attempts, host sweep, port 25
Hacking
Brute-Force
Anonymous
2025-11-15 05:12:35
(8 months ago)
SMTP scanner - relay access denied
Brute-Force
Exploited Host
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dwmp
2025-09-05 10:14:20
(10 months ago)
Sep 5 12:14:16 plesk postfix/smtpd[4116335]: warning: unknown[223.245.218.4]: SASL LOGIN authentica ...
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Sep 5 12:14:16 plesk postfix/smtpd[4116335]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure
Sep 5 12:14:17 plesk postfix/smtpd[4116335]: disconnect from unknown[223.245.218.4] ehlo=2 starttls=1 auth=0/1 commands=3/4
Sep 5 12:14:19 plesk postfix/smtpd[4115842]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: authentication failure
...
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Brute-Force
SSH
๐จ๐ฟ
jaj.cz
2025-03-31 13:06:59
(1 year ago)
Mar 31 15:06:37 mail postfix/smtpd[4016626]: warning: unknown[223.245.218.4]: SASL LOGIN authenticat ...
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Mar 31 15:06:37 mail postfix/smtpd[4016626]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 31 15:06:46 mail postfix/smtpd[4016626]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 31 15:06:59 mail postfix/smtpd[4019235]: warning: unknown[223.245.218.4]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
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Brute-Force
Anonymous
2025-02-23 07:45:10
(1 year ago)
Phishing and smtprelay and use of leaked account data
Hacking