fatal: no SASL authentication mechanisms - Postfix + Dovecot

I am trying to configure a simple email server that uses dovecot for the auth. I am inexperienced with the email procedures and I can't figure out what the problem is here: postfix/smtpd[26148]: fatal: no SASL authentication mechanisms

My postfix's config file:

tpd_banner = $myhostname ESMTP $mail_name (Ubuntu/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h myhostname = localhost alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = $myhostname mynetworks = 127.0.0.0/8, 10.0.0.0/24 mailbox_size_limit = 0 home_mailbox = Maildir/ virtual_mailbox_domains = /etc/postfix/vhosts virtual_mailbox_base = /home/vmail virtual_mailbox_maps = hash:/etc/postfix/vmaps virtual_minimum_uid = 1000 virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 recipient_delimiter = + inet_interfaces = all smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noplaintext,noanonymous smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth-client 

My dovecot config:

auth_mechanisms = plain cram-md5 auth_verbose = yes base_dir = /var/run/dovecot/ info_log_path = /var/log/dovecot.info log_path = /var/log/dovecot log_timestamp = "%Y-%m-%d %H:%M:%S " mail_location = maildir:/home/vmail/%d/%n passdb { args = /etc/dovecot/passwd driver = passwd-file } protocols = imap pop3 service auth { executable = /usr/lib/dovecot/auth user = root } service imap-login { chroot = login executable = /usr/lib/dovecot/imap-login user = dovecot } service imap { executable = /usr/lib/dovecot/imap } service pop3-login { chroot = login executable = /usr/lib/dovecot/pop3-login user = dovecot } service pop3 { executable = /usr/lib/dovecot/pop3 } ssl = no userdb { args = /etc/dovecot/users driver = passwd-file } valid_chroot_dirs = /var/spool/vmail protocol pop3 { pop3_uidl_format = %08Xu%08Xv } 

What is wrong with this configuration?

2 Answers

I'm not sure if your socket private/auth-client exists. Try to replace with: smtpd_sasl_path = private/auth in main.cf.

The problem was that I had to generate a TLS certificate and make dovecot and postfix use it. The private/auth file will be generated by dovecot automatically after that.