Outlook with Dovecot

[Elise]

dovecot-2.3.11.3_1

Hi group, I have a problem with connecting Outlook 2019 client to my 
server (BSD 21.2).
Running Postfix and Dovecot.

[all.log]

Dec 12 16:53:41 poseidon dovecot[36185]: imap-login: Disconnected (auth 
failed, 1 attempts in 2 secs): user=<elise at xxxxx.xx>, method=PLAIN, 
rip=82.x.x.x.x, lip=10.x.x.x, TLS: Connection closed, 
session=<U62faUa24N5SsH9H>

Providing the correct email address and password.

Strang thing is that with Thunderbird it all works fine; only Outlook is 
refused.

tx, Elise


[dovecot.conf]

auth_mechanisms = plain login
disable_plaintext_auth = no
mail_location = mbox:/usr/home/%u:INBOX=/var/mail/%u
mail_privileged_group = mail
passdb {
    driver = pam
}

protocols = imap

service auth {
   unix_listener auth-client {
     group = mail
     mode = 0660
     user = postfix
   }
   unix_listener auth-master {
     mode = 0666
   }
   user = root
}

service imap-login {
   inet_listener imap {
     address = 10.x.x.x
   }
   inet_listener imaps {
     address = 10.x.x.x
   }
}

#service pop3-login {
#  inet_listener pop3 {
#    address = 10.x.x.x
#  }
#  inet_listener pop3s {
#    address = 10.x.x.x
#  }
#}

ssl = yes
ssl_ca =   </usr/local/share/certs/ca-root-nss.crt
ssl_cert = </usr/local/etc/dehydrated/certs/xxxx.xxx/fullchain.pem
ssl_key = </usr/local/etc/dehydrated/certs/xxxx.xxx/privkey.pem
ssl_cipher_list = HIGH:+TLSv1.2:+TLSv1.3
ssl_dh =   </usr/local/etc/dovecot/dh.pem

userdb {
   driver = passwd
}

protocol imap {
   imap_client_workarounds = "delay-newmail  tb-extra-mailbox-sep "
}

#protocol pop3 {
#  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
#  pop3_uidl_format = %08Xu%08Xv
#}

protocol lda {
   postmaster_address = postmaster at xxxxx.xxxx
   sendmail_path = /usr/sbin/sendmail
   mail_plugins = sieve
}



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