After my last certificate update, I noticed I was no longer able to send mail, although I could still receive mail perfectly.
In my mercuryS logs I am getting the following error...

17:09:13.477: --- 24 Jan 2024, 17:09:13.477 ---
17:09:13.477: Accepted connection from '89.240.5.180', port 587, timeout 30 secs.
17:09:13.477: Connection from 89.240.5.180, Wed Jan 24, 17:09:13
17:09:13.477: << 220 smtp.aviandirectory.uk ESMTP server ready.<cr><lf>
17:09:13.481: >> EHLO www.aviandirectory.uk<cr><lf>
17:09:13.481: << 250-smtp.aviandirectory.uk Hello www.aviandirectory.uk; ESMTPs are:<cr><lf>
17:09:13.481: << 250-TIME<cr><lf>
17:09:13.481: << 250-SIZE<cr><lf>
17:09:13.481: << 250-STARTTLS<cr><lf>
17:09:13.481: << 250 HELP<cr><lf>
17:09:13.525: >> STARTTLS<cr><lf>
17:09:13.525: << 220 OK, begin SSL/TLS negotiation now.<cr><lf>
17:09:13.790: [!] OpenSSL reported error -1/1 during handshake - diagnostics follow:
17:09:13.790: [!] -------------------------------------------------------------------------
17:09:13.790: [!] error:1417A0C1SL routines:tls_post_process_client_hello:no shared cipher
17:09:13.790: [!] -------------------------------------------------------------------------
17:09:13.790: --- Connection closed at 24 Jan 2024, 17:09:13.790. ---
17:09:13.790:

I reinstalled Certbot because I could not figure out why I was suddenly getting this error, it is not an error I have ever had before. Any tips on how to fix this would be greatly appreciated. Thanks

Hello,

did you rename the new certificates properly ?

Johannes

It's ok, I figured it out. I forgot to copy the fullchain.pem contents to the new renamed file, my mistake. I really need to write a readme.txt to remind myself to do this each time.
Thanks