Lines containing failures of 164.132.196.134
Feb  4 00:11:26 smtp-out sshd[20723]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=164.132.196.134  user=r.r
Feb  4 00:11:28 smtp-out sshd[20723]: Failed password for r.r from 164.132.196.134 port 55214 ssh2
Feb  4 00:11:30 smtp-out sshd[20723]: Received disconnect from 164.132.196.134 port 55214:11: Bye Bye [preauth]
Feb  4 00:11:30 smtp-out sshd[20723]: Disconnected from authenticating user r.r 164.132.196.134 port 55214 [preauth]
Feb  4 00:24:28 smtp-out sshd[21240]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=164.132.196.134  user=r.r
Feb  4 00:24:30 smtp-out sshd[21240]: Failed password for r.r from 164.132.196.134 port 50430 ssh2
Feb  4 00:24:32 smtp-out sshd[21240]: Received disconnect from 164.132.196.134 port 50430:11: Bye Bye [preauth]
Feb  4 00:24:32 smtp-out sshd[21240]: Disconnected from authenticating user r.r 164.132.196.134 p........
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2020-02-0905:53:011j0eaa-0002Eu-1c\<=verena@rs-solution.chH=\(localhost\)[123.24.64.65]:36796P=esmtpsaX=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256CV=noA=dovecot_login:verena@rs-solution.chS=2108id=595CEAB9B26648FB27226BD3272489D8@rs-solution.chT="girllikearainbow"forwalkerseddrick1049@yahoo.com2020-02-0905:53:491j0ebM-0002Hq-BE\<=verena@rs-solution.chH=\(localhost\)[123.20.166.82]:41535P=esmtpsaX=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256CV=noA=dovecot_login:verena@rs-solution.chS=2108id=BDB80E5D5682AC1FC3C68F37C35D5D76@rs-solution.chT="apleasantsurprise"forsantoskeith489@gmail.com2020-02-0905:54:051j0ebd-0002ID-72\<=verena@rs-solution.chH=\(localhost\)[183.89.214.112]:40908P=esmtpsaX=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256CV=noA=dovecot_login:verena@rs-solution.chS=2102id=D9DC6A3932E6C87BA7A2EB53A7FF4DD7@rs-solution.chT="girllikearainbow"forlovepromise274@mail.com2020-02-0905:54:221j0ebt-0002Ic-Ig\<=verena@rs-solution.chH=\(localhost\)[171.224.94.13]:34377P=esmtpsaX=TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256CV=

Feb  9 01:53:45 ws24vmsma01 sshd[10270]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.241.46.14
Feb  9 01:53:47 ws24vmsma01 sshd[10270]: Failed password for invalid user yex from 58.241.46.14 port 37701 ssh2
...

postfix

Feb  9 08:46:39 markkoudstaal sshd[3363]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=207.154.239.128
Feb  9 08:46:41 markkoudstaal sshd[3363]: Failed password for invalid user ebs from 207.154.239.128 port 44210 ssh2
Feb  9 08:49:33 markkoudstaal sshd[3917]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=207.154.239.128

Multiple SSH login attempts.

Feb  9 04:01:13 firewall sshd[2804]: Invalid user xcn from 13.79.245.192
Feb  9 04:01:15 firewall sshd[2804]: Failed password for invalid user xcn from 13.79.245.192 port 44350 ssh2
Feb  9 04:04:54 firewall sshd[2964]: Invalid user yzg from 13.79.245.192
...

unauthorized connection attempt

Feb  9 08:52:09 legacy sshd[11781]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.231.121.20
Feb  9 08:52:11 legacy sshd[11781]: Failed password for invalid user yvp from 111.231.121.20 port 43709 ssh2
Feb  9 08:55:59 legacy sshd[12032]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.231.121.20
...

2020-02-09T08:56:09.945719scmdmz1 sshd[4103]: Invalid user mp from 51.68.229.73 port 36482
2020-02-09T08:56:09.948714scmdmz1 sshd[4103]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=73.ip-51-68-229.eu
2020-02-09T08:56:09.945719scmdmz1 sshd[4103]: Invalid user mp from 51.68.229.73 port 36482
2020-02-09T08:56:12.369808scmdmz1 sshd[4103]: Failed password for invalid user mp from 51.68.229.73 port 36482 ssh2
2020-02-09T08:58:28.015334scmdmz1 sshd[4343]: Invalid user oju from 51.68.229.73 port 59586
...

Feb  9 08:16:43 mout sshd[27721]: Invalid user eut from 167.99.66.193 port 42063

Unauthorized IMAP connection attempt

Feb  8 21:59:22 web1 sshd\[31281\]: Invalid user wip from 13.68.137.194
Feb  8 21:59:22 web1 sshd\[31281\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=13.68.137.194
Feb  8 21:59:24 web1 sshd\[31281\]: Failed password for invalid user wip from 13.68.137.194 port 37716 ssh2
Feb  8 22:03:50 web1 sshd\[31663\]: Invalid user tdb from 13.68.137.194
Feb  8 22:03:50 web1 sshd\[31663\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=13.68.137.194

Feb  9 06:52:50 elektron postfix/smtpd\[14898\]: NOQUEUE: reject: RCPT from unknown\[49.68.146.85\]: 450 4.7.1 Client host rejected: cannot find your hostname, \[49.68.146.85\]\; from=\ to=\ proto=ESMTP helo=\
Feb  9 06:53:26 elektron postfix/smtpd\[15851\]: NOQUEUE: reject: RCPT from unknown\[49.68.146.85\]: 450 4.7.1 Client host rejected: cannot find your hostname, \[49.68.146.85\]\; from=\ to=\ proto=ESMTP helo=\
Feb  9 06:54:07 elektron postfix/smtpd\[14898\]: NOQUEUE: reject: RCPT from unknown\[49.68.146.85\]: 450 4.7.1 Client host rejected: cannot find your hostname, \[49.68.146.85\]\; from=\ to=\ proto=ESMTP helo=\
Feb  9 06:54:54 elektron postfix/smtpd\[14898\]: NOQUEUE: reject: RCPT from unknown\[49.68.146.85\]: 450 4.7.1 Client host rejected: cannot find your hostname, \[49.68.146.85\]\; from=\ to=\ proto=

Feb  9 05:54:26 mout sshd[17685]: Invalid user wqr from 145.239.82.11 port 34140