Yesterday, this IP was the source of 54 failed authentications targeting 26 unique usernames on our ...
show moreYesterday, this IP was the source of 54 failed authentications targeting 26 unique usernames on our Mail Server.
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Jan 19 08:20:02 srv03 postfix/submission/smtpd[2525947]: lost connection after CONNECT from unknown[ ...
show moreJan 19 08:20:02 srv03 postfix/submission/smtpd[2525947]: lost connection after CONNECT from unknown[5.10.250.8]
Jan 19 08:20:06 srv03 postfix/submission/smtpd[2525947]: warning: unknown[5.10.250.8]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jan 19 08:20:09 srv03 postfix/submission/smtpd[2525947]: lost connection after AUTH from unknown[5.10.250.8]
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2024-01-19T06:53:03.867760+00:00 jomu postfix/submission/smtpd[1076486]: lost connection after CONNE ...
show more2024-01-19T06:53:03.867760+00:00 jomu postfix/submission/smtpd[1076486]: lost connection after CONNECT from unknown[5.10.250.8]
2024-01-19T06:53:05.481991+00:00 jomu postfix/submission/smtpd[1076486]: warning: unknown[5.10.250.8]: SASL PLAIN authentication failed: (reason unavailable), sasl_username=(unavailable)
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Jan 19 13:40:50 Galaxy postfix/smtpd[106588]: lost connection after CONNECT from unknown[5.10.250.8] ...
show moreJan 19 13:40:50 Galaxy postfix/smtpd[106588]: lost connection after CONNECT from unknown[5.10.250.8]
Jan 19 13:40:53 Galaxy postfix/smtpd[106588]: lost connection after EHLO from unknown[5.10.250.8]
Jan 19 14:49:44 Galaxy postfix/smtpd[107107]: lost connection after CONNECT from unknown[5.10.250.8]
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(smtpauth) Failed SMTP AUTH login from 5.10.250.8 (GB/United Kingdom/-/-/-/[AS211059 Tribeka Web Adv ...
show more(smtpauth) Failed SMTP AUTH login from 5.10.250.8 (GB/United Kingdom/-/-/-/[AS211059 Tribeka Web Advisors S.A.]): 5 in the last 3600 secs
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Brute-Force
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