dovecot config - doveconf -n

dovecot.conf

# 2.0.19: /etc/dovecot/dovecot.conf
# OS: Linux 3.2.0-24-generic i686 Ubuntu 12.04 LTS
auth_mechanisms = plain login
disable_plaintext_auth = no
info_log_path = /var/log/dovecot.info
log_path = /var/log/dovecot.err
log_timestamp = "%Y-%m-%d %H:%M:%S "
mail_location = maildir:~/Maildir
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii$
mbox_lazy_writes = no
passdb {
  driver = pam
}
passdb {
  driver = passwd
}
protocols = imap pop3 sieve
ssl_cert = </etc/ssl/certs/ssl-mail.pem
ssl_key = </etc/ssl/private/ssl-mail.key
userdb {
  driver = passwd
}
protocol imap {
  imap_client_workarounds = delay-newmail
  mail_max_userip_connections = 10
}
protocol pop3 {
  mail_max_userip_connections = 10
  mail_plugins = quota
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_uidl_format = UID%u-%v
}
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
}

no SASL authentication mechanisms

May 20 20:28:27 servidor postfix/smtpd[3876]: warning: SASL: Connect to private/auth failed: No such file or directory
May 20 20:28:27 servidor postfix/smtpd[3876]: fatal: no SASL authentication mechanisms
May 20 20:28:28 servidor postfix/master[2653]: warning: process /usr/lib/postfix/smtpd pid 3876 exit status 1
May 20 20:28:28 servidor postfix/master[2653]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling

postfix config

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
always_add_missing_headers = yes
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
disable_vrfy_command = yes
dovecot_destination_recipient_limit = 1
home_mailbox = Maildir/
inet_interfaces = all
inet_protocols = all
invalid_hostname_reject_code = 554
mailbox_size_limit = 0
message_size_limit = 100240000
multi_recipient_bounce_reject_code = 554
mydestination = $myhostname, $mydomain, localhost
myhostname = mail.almeida.at
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.1.0/24
myorigin = /etc/mailname
non_fqdn_reject_code = 554
readme_directory = no
receive_override_options = no_address_mappings
recipient_delimiter = +
relay_domains_reject_code = 554
relayhost = [smtpa.netcabo.pt]
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_helo_required = yes
smtpd_recipient_restrictions = reject_unknown_sender_domain,
    reject_unknown_recipient_domain, reject_unauth_pipelining,
    permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = reject_unknown_sender_domain
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key
smtpd_tls_mandatory_ciphers = medium
smtpd_tls_mandatory_protocols = SSLv3, TLSv1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom
unknown_address_reject_code = 554
unknown_client_reject_code = 554
unknown_hostname_reject_code = 554
unknown_local_recipient_reject_code = 554
unknown_relay_recipient_reject_code = 554
unknown_virtual_alias_reject_code = 554
unknown_virtual_mailbox_reject_code = 554
unverified_recipient_reject_code = 554
unverified_sender_reject_code = 554
virtual_mailbox_maps = hash:/etc/postfix/virtual
virtual_transport = dovecot

relay error

May 20 20:07:23 servidor postfix/smtpd[3514]: NOQUEUE: reject: RCPT from a85-138-61-153.cpe.netcabo.pt[85.138.61.153]: 554 5.7.1 <malmeida@gmail.com>: Relay access denied; from=<mike@almeida.at> to=<malmeida@gmail.com> proto=SMTP helo=<[192.168.2.2]>