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Old 29th January 2008, 00:41
DanielB DanielB is offline
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Default Postfix: Generic mapping not working


It seems that my generic map does not work.

I have followed the guide "Howto: ISP-style Email Server with Debian-Etch and Postfix 2.3" (http://workaround.org/articles/ispmail-etch/) (postfix, mysql, dovecot, amavisd-new, clamav, spamassasin). I am using the latest postix 2.4.5 on a Ubuntu 7.10 amd64 server and everything works fine except for one thing -- the generic mapping.

I have, let say, a mylocaldomain.com which is my name of my local network and an external domain called mydomain.com.

The problem is that when I am sending an email, the recived mail get the headings:

X-Virus-Scanned: Debian amavisd-new at mydomain.com
Received: from mail.mydomain.com ([])
by localhost (mail.mydomain []) (amavisd-new, port 10024)


Received: from [] (user.mylocaldomain.com [])
by mail.mydomain.com (Postfix)

So my question is, why is user.mylocaldomain.com shown? And also, why is my local IP shown ( How can I rewrite this with generic maps (or should I do something else?)

This is the output from postconf -n:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
content_filter = smtp-amavis:[]:10024
inet_interfaces = all
local_recipient_maps =
mailbox_size_limit = 0
masquerade_domains = mail.mydomain.com mydomain.com
mydestination = mail.mydomain.com localhost.mydomain.com localhost localhost.mylocaldomain.com server.mylocaldomain.com
mydomain = mydomain.com
myhostname = mail.mydomain.com
mynetworks =,
myorigin = /etc/mailname
proxy_interfaces = xxx.yyy.zzz.www (my ip of mydomain.com)
receive_override_options = no_address_mappings
recipient_delimiter = +
relayhost =
smtp_generic_maps = hash:/etc/postfix/generic
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,reject _unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_tls_CAfile = /etc/ssl/rootca.pem
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/cert/mail.mydomain.com.pem
smtpd_tls_key_file = /etc/ssl/key/mail.mydomain.com.pem
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtpd_use_tls = yes
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,mysql:/etc/postfix/mysql-email2email.cf
virtual_gid_maps = static:5000
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_transport = dovecot
virtual_uid_maps = static:5000

Note that I have the line: smtp_generic_maps = hash:/etc/postfix/generic. In this "generic"-file I have tried many different mappings without success. It seems that this file is not read, I am not sure. Note also "receive_override_options = no_address_mappings" but this only effects the received mails and not when you send, or?

I have added the following to my master.cf:

dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -d ${recipient}
smtp-amavis unix - - n - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
-o max_use=20
-o smtp_generic_maps=
-o disable_mime_output_conversion=yes
# inet n - - - - smtpd
-o content_filter=
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_delay_reject=no
-o smtpd_client_restrictions=permit_mynetworks,reject
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,rej ect
-o smtpd_data_restrictions=reject_unauth_pipelining
-o smtpd_end_of_data_restrictions=
-o mynetworks=
-o smtpd_error_sleep_time=0
-o smtpd_soft_error_limit=1001
-o smtpd_hard_error_limit=1000
-o smtpd_client_connection_count_limit=0
-o smtpd_client_connection_rate_limit=0
-o receive_override_options=no_header_body_checks,no_ unknown_recipient_checks
-o local_header_rewrite_clients=
-o smtpd_authorized_xforward_hosts=

As far as I under stand is that when I am sending an email it goes first to Amavis on port 10024. Since the transport map for Amavis includes "smtp_generic_maps= ", the "generic"-file is not used at this stage. The email is then sent to port 10025 where Postfix take over to finally send the email. Since the transpost map for "" does NOT contain "smtp_generic_maps= " the generic map should be used, but it doesn't. Or?

I have one more question. Let say that some of you solve my problem and the generic mapping works! How can I do the following:

user.mylocaldomian.com myname.domain.com #(case 1)
user.mylocaldomian.com myname.otherdomain.com #(case 2)

I don't know if you understand what I am trying to say. Let say I host two domains on my server (my work mail and private mail). If I am the user on a local machine and want to send a mail using "myname.domain.com" I want the generic map to use "case 1" but if I instead use "myname.otherdomain.com", the "case 2" should be mapped.

I guess I don't really understand the generic mapping because I can not see how this can be done. So how do you do something like this?

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