Providing the info requested now. dovecot --version: 2.0.19
dovecot -n: # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-54-virtual x86_64 Ubuntu 12.04.3 LTS ext4 mail_location = maildir:/var/spool/mail/%u managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave passdb { driver = pam } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } protocols = imap pop3 sieve service auth { unix_listener /var/spool/postfix/private/dovecot-auth { group = postfix mode = 0660 user = postfix } } ssl_cert = </etc/ssl/certs/dovecot.pem ssl_cipher_list = ALL:!LOW:!SSLv2:ALL:!aNULL:!ADH:!eNULL:!EXP:RC4+RSA:+HIGH:+MEDIUM ssl_key = </etc/ssl/private/dovecot.pem userdb { driver = passwd } protocol imap { imap_client_workarounds = delay-newmail mail_max_userip_connections = 10 } protocol pop3 { mail_max_userip_connections = 10 pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } protocol lda { deliver_log_format = msgid=%m: %$ mail_plugins = sieve postmaster_address = postmaster quota_full_tempfail = yes rejection_reason = Your message to <%t> was automatically rejected:%n%r } Mail server has IPV4/IPV6 address of: 54.193.41.94 / 2001:470:1f08:ddd::2 Client IPV4 / IPV6 address: 88.195.204.203 / 2001:470:28:743:4923:c01c:c89a:567a Dovecot should allow Microsoft Outlook 2010 Email Client to connect, but it wont. Outlook tries to use disabled plaintext authenication when it's not able to find encrypted method to log in. Hope this helps. 15.12.2013 1:20, Daniel Parthey kirjoitti: > Hi Sami, > > please read carefully: > http://www.dovecot.org/mailinglists.html > > You're missing some points: > > * Mention the Dovecot version number. Use dovecot --version to get it. > * Use dovecot -n output when showing your configuration > * How does your network setup look like? Which service connects where? > * What would you expect dovecot to do? > * What happens actually? > > Regards > Daniel