I'm attempting to set up postfix + dovecot + postfixadmin on Ubuntu 20.04
using the provided packages.

This is what the SASL configs in main.cf look like:

root@mailserver:/etc/postfix# grep -i sasl main.cf
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot

#smtpd_sasl_path = /var/run/dovecot/auth-client
#smtpd_sasl_path = /var/spool/postfix/private/auth
smtpd_sasl_path = private/auth
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated, reject_unauth_destination
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated
reject_unauth_destination
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = $smtpd_sasl_security_options
smtpd_sasl_local_domain = $mydomain

Every minute I get:
Sep 25 22:36:28 mailserver postfix/smtpd[6385]: warning: unsupported SASL
server implementation: dovecot
                                                         39,1          70%
Sep 25 22:36:28 mailserver postfix/smtpd[6385]: fatal: SASL per-process
initialization failed
Sep 25 22:36:29 mailserver postfix/master[6191]: warning: process
/usr/lib/postfix/sbin/smtpd pid 6385 exit status 1
Sep 25 22:36:29 mailserver postfix/master[6191]: warning:
/usr/lib/postfix/sbin/smtpd: bad command startup -- throttling

in the /var/log/mail.log

root@mailserver:~# postconf -a
cyrus
dovecot
root@mailserver:~#

What am I missing?

Thanks.

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