Is this a hack or a server problem. IP was listed in abusedb about a year ago.
<pattern repeats> Nov 16 09:14:36 theranch postfix/smtpd[6094]: connect from unknown[87.236.215.11] Nov 16 09:14:36 theranch postfix/smtpd[6094]: lost connection after AUTH from unknown[87.236.215.11] Nov 16 09:14:36 theranch postfix/smtpd[6094]: disconnect from unknown[87.236.215.11] ehlo=1 auth=0/1 commands=1/2 Nov 16 09:14:36 theranch postfix/smtpd[6094]: connect from unknown[87.236.215.11] Nov 16 09:14:37 theranch postfix/smtpd[6094]: lost connection after AUTH from unknown[87.236.215.11] Nov 16 09:14:37 theranch postfix/smtpd[6094]: disconnect from unknown[87.236.215.11] ehlo=1 auth=0/1 commands=1/2 Nov 16 09:14:37 theranch postfix/smtpd[6094]: connect from unknown[87.236.215.11] Nov 16 09:14:38 theranch postfix/smtpd[6094]: lost connection after AUTH from unknown[87.236.215.11] Nov 16 09:14:38 theranch postfix/smtpd[6094]: disconnect from unknown[87.236.215.11] ehlo=1 auth=0/1 commands=1/2 Nov 16 09:14:38 theranch postfix/smtpd[6094]: connect from unknown[87.236.215.11] Nov 16 09:14:39 theranch postfix/smtpd[6094]: lost connection after AUTH from unknown[87.236.215.11] Nov 16 09:14:39 theranch postfix/smtpd[6094]: disconnect from unknown[87.236.215.11] ehlo=1 auth=0/1 commands=1/2 Nov 16 09:14:39 theranch postfix/smtpd[6094]: connect from unknown[87.236.215.11] Nov 16 09:14:39 theranch postfix/smtpd[6094]: lost connection after AUTH from unknown[87.236.215.11] Nov 16 09:14:39 theranch postfix/smtpd[6094]: disconnect from unknown[87.236.215.11] ehlo=1 auth=0/1 commands=1/2 Nov 16 09:14:40 theranch postfix/smtpd[6094]: connect from unknown[87.236.215.11] Nov 16 09:14:40 theranch postfix/smtpd[6094]: lost connection after AUTH from unknown[87.236.215.11] Nov 16 09:14:40 theranch postfix/smtpd[6094]: disconnect from unknown[87.236.215.11] ehlo=1 auth=0/1 commands=1/2 Nov 16 09:18:00 theranch postfix/anvil[6096]: statistics: max connection rate 70/60s for (smtp:87.236.215.11) at Nov 16 09:14:40 Nov 16 09:18:00 theranch postfix/anvil[6096]: statistics: max connection count 1 for (smtp:87.236.215.11) at Nov 16 09:13:45 Nov 16 09:18:00 theranch postfix/anvil[6096]: statistics: max cache size 1 at Nov 16 09:13:45
