Postfix 忽略 SASL 與 dovecot - 如何調試？

我最近升級了我的伺服器（Ubuntu 12.03），今天我注意到 SMTP 不再提供身份驗證。

我的設置是使用虛擬郵箱 + MySQL。

遠端登錄會話：

telnet mail.mydomain.net 25

Connected to mail.mydomain.net.
Escape character is '^]'.
220 mail.mydomain.net ESMTP Postfix (Ubuntu)
ehlo test-domain.com
250-mail.mydomain.net
250-PIPELINING
250-SIZE 402400000
250-VRFY
250-ETRN
250-STARTTLS
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

但是，我不知道在哪裡調試問題。（編輯：幸運的是，仍然禁止轉發，我的測試有缺陷）。

我的相關後綴配置：

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key
smtpd_use_tls = yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

smtpd_sasl_auth_enable = yes
broken_sasl_auth_clients = yes
smtpd_sasl_authenticated_header = yes
smtp_tls_note_starttls_offer = yes 

# Strip internal IPs and hostnames
header_checks = regexp:/etc/postfix/header_checks
smtpd_sender_restrictions = permit_mynetworks, reject_non_fqdn_sender, reject_sender_login_mismatch, reject_unknown_sender_domain
smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_sasl_authenticated, reject_unauth_destination, permit_mynetworks

#virtual_create_maildirsize = yes
#virtual_maildir_extended = yes

proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps

virtual_transport = dovecot
dovecot_destination_recipient_limit = 1
content_filter = smtp-amavis:[127.0.0.1]:10024
receive_override_options = no_address_mappings

smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_tls_auth_only = yes

smtpd_tls_received_header = yes
smtpd_tls_mandatory_protocols = SSLv3, TLSv1
#smtpd_tls_mandatory_ciphers = medium
tls_random_source = dev:/dev/urandom

以及來自 Dovecot (2.x) 的相關位：

ssl_cert_file = /etc/ssl/certs/dovecot.pem
ssl_key_file = /etc/ssl/private/dovecot.pem

auth_mechanisms = plain login

service auth {
   user = root 
   unix_listener /var/spool/postfix/private/auth {
       user = postfix
       group = postfix
       mode = 0660
   } 
   unix_listener auth-master {
       user = vmail
       mode = 0600
   }
}

passdb {
   driver = sql
   args = /etc/dovecot/dovecot-sql.conf
}


userdb {
   driver = static
   args = uid=5000 gid=5000 home=/home/vmail/%d/%n allow_all_users=yes
}

/etc/default/saslauthd：

START=yes
DESC="SASL Authentication Daemon"
NAME="saslauthd"
MECHANISMS="pam"
MECH_OPTIONS=""
THREADS=5
OPTIONS="-c -m /var/spool/postfix/var/run/saslauthd -r"

/etc/pam.d/smtp:

auth    required   pam_mysql.so user=mailadmin passwd=PASSWORD host=127.0.0.1 db=mail table=users usercolumn=email passwdcolumn=password crypt=1
account sufficient pam_mysql.so user=mailadmin passwd=PASSWORD host=127.0.0.1 db=mail table=users usercolumn=email passwdcolumn=password crypt=1

相同的設置適用於 Debian Wheezy VM，所以我不確定錯誤在哪裡。請注意，IMAP / 郵件伺服器端的身份驗證可以完美執行。

原因是升級在沒有註意到的情況下改變了我的配置。

將事物設置為

smtpd_recipient_restrictions =
  permit_mynetworks
  permit_sasl_authenticated
  reject_unauth_destination
  reject_non_fqdn_hostname
  reject_invalid_hostname
  reject_unauth_pipelining
  reject_unknown_sender_domain
  reject_rbl_client bl.spamcop.net
  reject_rbl_client zen.spamhaus.org

smtpd_sender_restrictions =
  reject_non_fqdn_sender
  reject_unknown_sender_domain
  check_sender_access hash:/etc/postfix/sender_access

smtpd_tls_auth_only = yes
smtpd_tls_security_level = encrypt

恢復了以前的行為（具體來說，permit_mynetworks不再存在於 smtpd_sender_restrictions 中）。

引用自：https://serverfault.com/questions/502787