Discover if the mail servers for comcastbusiness.net can be reached through a secure connection.
To establish a secure connection a mail server has to offer STARTTLS (SSL), a trustworthy SSL certificate, support for the Diffie-Hellman-Algorithm to guarantee Perfect Forward Secrecy and must not be vulnerable against the Heartbleed attack. Futhermore we recommend using end-to-end encryption with GnuPG.
Report created Mon, 25 May 2020 10:35:27 +0000
These servers are responsible for incoming mails to @comcastbusiness.net addresses.
| Hostname / IP address | Priority | STARTTLS | Certificates | Protocol | ||
|---|---|---|---|---|---|---|
|
comcastbusiness.net
165.160.13.20
Results incomplete
|
- | not checked |
|
11 s
|
||
|
comcastbusiness.net
165.160.15.20
Results incomplete
|
- | not checked |
|
11 s
|
We have received emails from these servers with @comcastbusiness.net sender addresses. Test mail delivery
| Host | TLS Version & Cipher | |
|---|---|---|
| 50-247-72-33-static.hfc.comcastbusiness.net (50.247.72.33) |
Insecure - not encrypted!
|
|
| 50-197-210-138-static.hfc.comcastbusiness.net (50.197.210.138) |
Insecure - not encrypted!
|
|
| 50-250-56-129-static.hfc.comcastbusiness.net (50.250.56.129) |
Insecure - not encrypted!
|
|
| 50-195-7-180-static.hfc.comcastbusiness.net (50.195.7.180) |
Insecure - not encrypted!
|
|
| 50-250-75-153-static.hfc.comcastbusiness.net (50.250.75.153) |
Insecure - not encrypted!
|
|
| 96-87-188-193-static.hfc.comcastbusiness.net (96.87.188.193) |
Insecure - not encrypted!
|
|
| 50-242-100-89-static.hfc.comcastbusiness.net (50.242.100.89) |
Insecure - not encrypted!
|
|
| 50-253-49-189-static.hfc.comcastbusiness.net (50.253.49.189) |
Insecure - not encrypted!
|
|
| 50-196-148-195-static.hfc.comcastbusiness.net (50.196.148.195) |
Insecure - not encrypted!
|
|
| 50-205-151-218-static.hfc.comcastbusiness.net (50.205.151.218) |
Insecure - not encrypted!
|
|
| unknown (50.233.42.98) |
Insecure - not encrypted!
|
|
| unknown (96.69.174.252) |
Insecure - not encrypted!
|
|
| unknown (96.77.43.233) |
Insecure - not encrypted!
|
|
| unknown (50.235.92.14) |
Insecure - not encrypted!
|
|
| unknown (96.70.52.227) |
Insecure - not encrypted!
|
|
| 96-84-128-196-static.hfc.comcastbusiness.net (96.84.128.196) |
Insecure - not encrypted!
|
|
| 50-196-126-233-static.hfc.comcastbusiness.net (50.196.126.233) |
Insecure - not encrypted!
|
|
| 50-197-139-162-static.hfc.comcastbusiness.net (50.197.139.162) |
Insecure - not encrypted!
|
|
| 50-244-9-1-static.hfc.comcastbusiness.net (50.244.9.1) |
Insecure - not encrypted!
|
|
| 96-87-184-101-static.hfc.comcastbusiness.net (96.87.184.101) |
Insecure - not encrypted!
|
|
| 96-82-74-129-static.hfc.comcastbusiness.net (96.82.74.129) |
Insecure - not encrypted!
|
|
| unknown (50.199.46.20) |
Insecure - not encrypted!
|
|
| unknown (50.197.162.169) |
Insecure - not encrypted!
|
|
| unknown (96.82.74.134) |
Insecure - not encrypted!
|
|
| unknown (96.69.88.83) |
Insecure - not encrypted!
|
|
| unknown (96.77.77.53) |
Insecure - not encrypted!
|
|
| 50-207-130-198-static.hfc.comcastbusiness.net (50.207.130.198) |
Insecure - not encrypted!
|
|
| 74-95-1-114-SFBA.hfc.comcastbusiness.net (74.95.1.114) |
Insecure - not encrypted!
|
|
| 64-139-79-35-richmond.hfc.comcastbusiness.net (64.139.79.35) |
Insecure - not encrypted!
|
|
| 50-204-122-230-static.hfc.comcastbusiness.net (50.204.122.230) |
Insecure - not encrypted!
|
|
| 50-192-49-5-static.hfc.comcastbusiness.net (50.192.49.5) |
Insecure - not encrypted!
|
|
| 50-197-38-230-static.hfc.comcastbusiness.net (50.197.38.230) |
Insecure - not encrypted!
|
|
| 50-253-211-61-static.hfc.comcastbusiness.net (50.253.211.61) |
Insecure - not encrypted!
|
|
| 198-0-198-132-static.hfc.comcastbusiness.net (198.0.198.132) |
Insecure - not encrypted!
|
|
| 50-192-49-195-static.hfc.comcastbusiness.net (50.192.49.195) |
Insecure - not encrypted!
|
|
| 50-240-188-72-static.hfc.comcastbusiness.net (50.240.188.72) |
Insecure - not encrypted!
|
|
| 50-192-195-69-static.hfc.comcastbusiness.net (50.192.195.69) |
Insecure - not encrypted!
|
|
| 50-247-207-5-static.hfc.comcastbusiness.net (50.247.207.5) |
Insecure - not encrypted!
|
|
| 96-87-16-153-static.hfc.comcastbusiness.net (96.87.16.153) |
Insecure - not encrypted!
|
|
| 50-245-153-217-static.hfc.comcastbusiness.net (50.245.153.217) |
Insecure - not encrypted!
|
No Certificates found
Heartbleed