Multidomain ssl config ?

[Maurizio Caloro]

on postfix now this seems to run, and with  dovecot i need also handle this two domains,
but appairing this error messages. like:

Jun 29 20:49:28 Dovecot/imap-login: Info: Disconnected (no auth attempts in 0 secs): user=<>,
rip=a.b.c.d, lip=37.120.190.188, TLS handshaking: SSL_accept() failed: error:14094416:SSL routines:
ssl3_read_bytes:sslv3 alert certificate unknown: SSL alert number 46, session=<FdklDjkdfrkfi>

Running with Debian Buster

# dovecot --version
2.3.4.1 (f79e8e7e4)

# nmail.caloro.ch
local_name nmail.caloro.ch {
    ssl_cert = </etc/letsencrypt/live/nmail.caloro.ch/privkey.pem
    ssl_key = </etc/letsencrypt/live/nmail.caloro.ch/fullchain.pem
    }
# nmail.calm-ness.ch
local_name nmail.calm-ness.ch {
    ssl_cert = </etc/letsencrypt/live/nmail.calm-ness.ch/privkey.pem
    ssl_key = </etc/letsencrypt/live/nmail.calm-ness.ch/fullchain.pem
    }

thanks for possible help