Ich habe hier ein Gespann aus Postfix, Dovecot, Postfixadmin und Mysql am laufen.
Bei nicht existierenden Postfächern/Aliasen bekomme ich ein
"451 Temporary lookup failure" statt ein "550 Recipient address rejected: User unknown in virtual mailbox table", dies produziert leider Backscatter
Wie kann das Problem lösen?
Ein telnet auf die 25 ergibt:
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220 mail.der-mailserver.tld ESMTP Postfix (Debian/GNU)
ehlo der-mailserver.tld
250-mail.der-mailserver.tld
250-PIPELINING
250-SIZE 40000000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
mail from:<dort@example.tld>
250 2.1.0 Ok
rcpt to:<nixgueltiges@der-mailserver.tld>
451 4.3.0 <nixgueltiges@der-mailserver.tld>: Temporary lookup failure
rcpt to:<gueltiges@der-mailserver.tld>
250 2.1.5 Ok
Das Verhalten ist reproduzierbar, ein vorhandener Alias wird immer korrekt aufgelöst, ohne Aliaseintrag gibts einen 451 statt 550. Ein überlasteter Mysqlserver ist ausschließbar.
ein postmap ergibt folgendes:
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postmap -qv nixgueltiges@der-mailserver.tld mysql:/etc/postfix/mysql_virtual_alias_maps.cf
...
postmap: dict_open: mysql:/etc/postfix/mysql_virtual_alias_maps.cf
postmap: dict_mysql_get_active: attempting to connect to host 127.0.0.1
postmap: dict_mysql: successful connection to host 127.0.0.1
postmap: dict_mysql: successful query from host 127.0.0.1
postmap: dict_mysql_lookup: retrieved 0 rows
postmap -qv gueltiges@der-mailserver.tld mysql:/etc/postfix/mysql_virtual_alias_maps.cf
postmap: dict_open: mysql:/etc/postfix/mysql_virtual_alias_maps.cf
postmap: dict_mysql_get_active: attempting to connect to host 127.0.0.1
postmap: dict_mysql: successful connection to host 127.0.0.1
postmap: dict_mysql: successful query from host 127.0.0.1
postmap: dict_mysql_lookup: retrieved 1 rows
das logfile:
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Mar 26 12:00:50 localhost postfix/smtpd[21738]: maps_find: virtual_alias_maps: @der-mailserver.tld: not found
Mar 26 12:00:50 localhost postfix/smtpd[21738]: mail_addr_find: nix@der-mailserver.tld -> (not found)
Mar 26 12:00:50 localhost postfix/smtpd[21738]: maps_find: virtual_mailbox_maps: nix@der-mailserver.tld: search aborted
Mar 26 12:00:50 localhost postfix/smtpd[21738]: mail_addr_find: nix@der-mailserver.tld -> (try again) die virtual_alias_maps.cf:
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user = einuser
password = einpassword
hosts = 127.0.0.1
dbname = postfix
table = alias
select_field = goto
where_field = address
additional_conditions = and active = '1'
#query = SELECT goto FROM alias WHERE address='%s' AND active = '1'
und postconf -n
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alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
inet_interfaces = all
inet_protocols = ipv4
mailbox_command = /usr/bin/maildrop
mailbox_size_limit = 0
message_size_limit = 40000000
mydestination = mail.der-mailserver.tld, localhost, localhost.der-mailserver.tld
myhostname = mail.der-mailserver.tld
mynetworks = 127.0.0.0/8
myorigin = /etc/mailname
permit_mx_backup_networks = x.x.x.x
recipient_delimiter = +
relay_domains = $mydestination, mysql:/etc/postfix/mysql_relay_domains_maps.cf
relay_recipient_maps =
relayhost =
smtp_tls_cert_file = /etc/postfix/cert.pem
smtp_tls_key_file = /etc/postfix/key.pem
smtp_tls_note_starttls_offer = yes
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_enforce_tls = no
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, permit_mx_backup, reject_unlisted_recipient, reject_unauth_destination, reject_unverified_recipient, permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_tls_cert_file = /etc/postfix/cert.pem
smtpd_tls_key_file = /etc/postfix/key.pem
smtpd_tls_loglevel = 3
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtpd_use_tls = yes
transport_maps = hash:/etc/postfix/transport
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
virtual_gid_maps = static:1001
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
virtual_mailbox_limit = 512000000
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 1001
virtual_transport = dovecot
virtual_uid_maps = static:1001
