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Verification of certificate validity

If the result is positive, there is no need for further action. If the result is negative, please read the following instructions.

Result positive Certificate is already valid
Result negativ Certificate not yet valid
Description The message means that your server certificate is not yet valid. Your server is displayed to visitors as insecure or untrustworthy. If a user calls your server with TLS, they may receive an error message.
Background Server certificates provide more security on the Internet and serve to verify (authenticity) the identity of servers. A certificate is issued by official, trustworthy institutions. A certificate is not forgeable. In normal life, a certificate is comparable to an identity card or a notarial certification. Similar to a passport, certificates also have a certain validity period. Certificates thus ensure secure data exchange and form an important basis of trust for operators, e.g. of online shops.
Consequence Most mail programs are configured so that by default they do not trust servers with an expired certificate. A server with an expired certificate thus generates a warning each time your server is called.
Solution/Tips If Certificate not yet valid has been reported, use your old certificate as long as it is still valid. You can find out how to renew certificates here: [[Zertifikat-Abgelaufen/DE Certificate expired]] (German only).