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Exim error: tls_post_process_client_hello no shared cipher

| 16:04:56 09.01.2021

Should you see any TLS/SSL related errors in Exim's logs on a DirectAdmin server (on a recipient's side) we have a possible explanation and fix.

Here are two examples of such errors:

(SSL_accept (TLSv1)): error:14209102:SSL routines:tls_early_post_process_client_hello:unsupported protocol
(SSL_accept): error:1417A0C1:SSL routines:tls_post_process_client_hello:no shared cipher

The reason might still be the same.

A sending server or software is using too old and insecure SSL/TLS ciphers or protocol.

Check the article:

for a possible fix on your server's side.

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