Ahoj, Dňa Tue, 12 Sep 2023 12:28:13 +0200 Camille - Clean Mailbox via mailop <mailop@mailop.org> napísal:
> └─# openssl s_client -connect mx.clean-mailbox.com:25 -starttls smtp I can do TLS1.0, TLS1.2 & TLS1.3 handshake with your server and GnuTLS reports certificate as valid, thus the certificate itself seems to not be the root of problem. Perhaps some administrative restrictions on sender side... regards -- Slavko https://www.slavino.sk
pgpazp7ylUKeZ.pgp
Description: Digitálny podpis OpenPGP
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