Not reachable or improvement possible (IPv6)Unfortunately, this e-mail domain can not be reached by senders using modern IPv6 addresses, or improvement is possible. You should ask your e-mail provider to fully enable IPv6.
- no mail exchanges (MX) set
- none of the name servers (NS) comes with an IPv6 address
Not protected from false DNS information (DNSSEC)Unfortunately, this e-mail domain does not use DNSSEC or there is an error in its configuration. Senders to this address are currently not protected from having their messages delivered to a fake mailbox. Receiving systems can not be sure that all authentication features and policies to check whether a mail message is spoofed and how to handle it is genuine. You should ask your e-mail provider to set up DNSSEC or to fix the issues in its configuration.
Tested domain name: gfreenet.de
- Not secured with DNSSEC. Your registrar (most often also your DNS operator) is:
Not/partially protected from mail spoofing (DKIM/SPF/DMARC)Unfortunately, this e-mail domain does not use DKIM, SPF, and DMARC, or there is an error in its configuration. Receivers can currently not use all authentication features and policies to check whether a mail message is spoofed and how to handle it. Attackers are insufficiently prevented from abusing this mail address for phishing, or to send spam or viruses. You should ask your e-mail provider to set up DMARC, DKIM and SPF, or to fix the issues in their configurations.
- a DKIM record (TXT) has been found
a DMARC policy (TXT record) has been found:
v=DMARC1; p=none; rua=mailto:firstname.lastname@example.org; ruf=mailto:email@example.com
- an SPF policy (TXT record) could not be found
No/insufficiently secure connection possible (STARTTLS)Unfortunately; this incoming mail server does not or insufficienly support STARTTLS. This means that sending mail servers can not establish a secure connection with this mail server which makes it vulnerable for eavesdropping attacks by (passive) attackers. You should ask your mail provider to enable STARTTLS and to configure it correctly.
- no mail servers (MX) set