Discover if the mail servers for posteo.de 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 Fri, 14 Feb 2025 20:58:04 +0000
These servers are responsible for incoming mails to @posteo.de addresses.
Hostname / IP address | Priority | STARTTLS | Certificates | Protocol | ||
---|---|---|---|---|---|---|
mx03.posteo.de
185.67.36.70
Results incomplete
|
10 |
supported
|
mx01.posteo.de |
|
6 s
|
|
mx03.posteo.de
185.67.36.63
Results incomplete
|
10 |
supported
|
mx01.posteo.de |
|
7 s
|
|
mx01.posteo.de
185.67.36.61
Results incomplete
|
10 |
supported
|
mx01.posteo.de |
|
7 s
|
|
mx01.posteo.de
185.67.36.62
Results incomplete
|
10 |
supported
|
mx01.posteo.de |
|
7 s
|
|
mx04.posteo.de
185.67.36.71
Results incomplete
|
10 |
supported
|
mx01.posteo.de |
|
7 s
|
|
mx04.posteo.de
185.67.36.64
Results incomplete
|
10 |
supported
|
mx01.posteo.de |
|
7 s
|
We have received emails from these servers with @posteo.de sender addresses. Test mail delivery
Host | TLS Version & Cipher | |
---|---|---|
mout01.posteo.de (185.67.36.65) |
TLSv1.3
TLS_AES_256_GCM_SHA384
|
|
mout02.posteo.de (185.67.36.66) |
TLSv1.3
TLS_AES_256_GCM_SHA384
|
DNS-based Authentication of Named Entities (DANE) is a protocol to allow X.509 certificates to be bound to DNS using TLSA records and DNSSEC.
Name | Options | DNSSEC | Matches |
---|---|---|---|
_25._tcp.mx03.posteo.de |
|
valid
|
— |
_25._tcp.mx03.posteo.de |
|
valid
|
valid
|
_25._tcp.mx03.posteo.de |
|
valid
|
— |
_25._tcp.mx03.posteo.de |
|
valid
|
— |
_25._tcp.mx01.posteo.de |
|
valid
|
— |
_25._tcp.mx01.posteo.de |
|
valid
|
— |
_25._tcp.mx01.posteo.de |
|
valid
|
valid
|
_25._tcp.mx01.posteo.de |
|
valid
|
— |
_25._tcp.mx04.posteo.de |
|
valid
|
— |
_25._tcp.mx04.posteo.de |
|
valid
|
valid
|
_25._tcp.mx04.posteo.de |
|
valid
|
— |
_25._tcp.mx04.posteo.de |
|
valid
|
— |