Shared Let's Encrypt ssl error on mail

[RickDeckard]

Hi, please need some suggesttions/help.

On Directadmin/Centos7 server, i've installed the shared Let's Encrypt ssl for admin login and as mail certificate.
After any automated renew, on any Apple devices (using "Mail" program or app) and sometimes "Thunderbird" or any other Client under Windows, certificate is not recognised.
On Thunderbird it's not a really problem (just need accept certificate again) but under Apple devices need reinstall of the mail.

Thanks

 

[Wanabo]

I have the same problem, it is annoying. Could this be fixed somehow?

 

[Erulezz]

And you are using the hostname (with the Lets Encrypt certificate) as incoming / outgoing server? I'm using Let's Encrypt certificates with Apple Mail for over a year now and I have never had this problem

 

[RickDeckard]

Yes, i'm using Server's Hostname, Thanks