Hi there, I've encountered an issue with the LDA in which I get a "Connection refused" error. There is a serverfault question ( http://serverfault.com/questions/517262/dovecot-with-postfix-configuration-h...) if you would like to read that version, otherwise, the details are as follows: Dovecot 2.0.19 Postfix 2.9.6 Ubuntu 12.04 The actual error message I receive is --------------------------------------------------------------- postfix/pickup[16842]: 019023A06AB: uid=1000 from=<vagrant> postfix/cleanup[19542]: 019023A06AB: message-id= <20130620140358.019023A06AB@mail-server-berkshelf> postfix/qmgr[16843]: 019023A06AB: from=, size=382, nrcpt=1 (queue active) dovecot: lda: Debug: Loading modules from directory: /usr/lib/dovecot/modules dovecot: lda: Debug: Module loaded: /usr/lib/dovecot/modules/lib90_sieve_plugin.so ---> dovecot: lda: Error: userdb lookup: connect(/var/run/dovecot/auth-userdb) failed: Connection refused dovecot: lda: Fatal: Internal error occurred. Refer to server log for more information. postfix/pipe[19545]: 019023A06AB: to=, relay=dovecot, delay=1.2, delays=0.04/0.01/0/1.1, dsn=4.3.0, status=deferred (temporary failure) dovecot -n snippet: -------------------------------------------------------------- # 2.0.19: /etc/dovecot/dovecot.conf # OS: Linux 3.2.0-23-generic x86_64 Ubuntu 12.04 LTS ext4 auth_debug = yes auth_debug_passwords = yes auth_mechanisms = plain login auth_socket_path = /var/run/dovecot/auth-userdb auth_verbose = yes auth_verbose_passwords = plain mail_debug = yes mail_location = maildir:/var/vmail/%d/%n/Maildir 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 { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve } postmaster_address = info@*****.com protocols = imap pop3 sieve imap pop3 service auth-worker { user = vmail } service auth { unix_listener /var/spool/postfix/private/auth { group = postfix mode = 0660 user = postfix } unix_listener auth-userdb { group = vmail mode = 0644 user = vmail } user = dovecot } service managesieve-login { inet_listener sieve { port = 4190 } } ssl = no ssl_cert =