Must be a valid IPv4 or IPv6 ip address, e.g. 127.0.0.1 or 2001:DB8:0:0:8:800:200C:417A
Basic Info

City: unknown

Region: unknown

Country: Germany

Internet Service Provider: 1&1 Internet SE

Hostname: unknown

Organization: unknown

Usage Type: Data Center/Web Hosting/Transit

Comments:
Type Details Datetime
attackbots
"SMTPD"	4960	174952	"2019-08-01 x@x
"SMTPD"	4960	174952	"2019-08-01 05:09:54.091"	"87.106.40.199"	"SENT: 550 Delivery is not allowed to this address."

IP Address:	87.106.40.199
Email x@x
No MX record resolves to this server for domain: valeres.fr


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=87.106.40.199
2019-08-01 18:13:18
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 87.106.40.199
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 30857
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;87.106.40.199.			IN	A

;; AUTHORITY SECTION:
.			3600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019080100 1800 900 604800 86400

;; Query time: 2 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Thu Aug 01 18:13:00 CST 2019
;; MSG SIZE  rcvd: 117
Host info
199.40.106.87.in-addr.arpa domain name pointer s16782267.onlinehome-server.info.
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

Non-authoritative answer:
*** Can't find 199.40.106.87.in-addr.arpa.: No answer

Authoritative answers can be found from:

Related IP info:
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Apr 21 15:24:20 Enigma sshd[29131]: Failed password for invalid user rh from 134.175.191.248 port 48556 ssh2
Apr 21 15:27:09 Enigma sshd[29533]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.191.248  user=root
Apr 21 15:27:12 Enigma sshd[29533]: Failed password for root from 134.175.191.248 port 56910 ssh2
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