LinuxQuestions.org - Postfix Question

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Postfix Question

Hi,

I recently switched my computer to Redhat 9. I want to set up a postfix email server. I have a few different domain names with multiple email address' associated with both. I have a dedicated ip address. How do I do this? Is there any documentation that can walk me through the precess?

Tim

A few destination domains or just domains your relay mail for?
man virtual will help you ...

I'm not really sure what the difference between a destination domain and a domain I relay mail for is.

what is man virtual?

Destination domain = your server is the final destionation. Relaying, let's say you relay mail for debian.org then I can connect to your SMTP server and send mail to debian.org, your smtp server accepts my mail (since it's configured to relay for debian.org) and sends it to the MX record of debian.org

Just run man virtual that's the man page of the "Postfix virtual domain mail delivery agent"!

My Postfix configuration looks like that:

Code:

# --------------------------------------------------------------------

# base configuration

# --------------------------------------------------------------------

alias_database                        = hash:/etc/aliases

alias_maps                        = $alias_database

allow_percent_hack                = no

append_dot_mydomain                = no

biff                                = no

#canonical_maps                        = hash:/etc/postfix/canonical

command_directory                = /usr/sbin

daemon_directory                = /usr/lib/postfix

inet_interfaces                        = 127.0.0.1, 192.168.84.82

myhostname                        = example.server.net

program_directory                = /usr/lib/postfix

queue_minfree                        = 26214400

setgid_group                        = postdrop

tls_daemon_random_source        = dev:/dev/urandom

tls_random_source                = dev:/dev/urandom

# --------------------------------------------------------------------







# --------------------------------------------------------------------

# smtp outgoing

# --------------------------------------------------------------------

delay_warning_time                = 24h

#relayhost                        = [example.relayhost.net]

#smtp_sasl_auth_enable                = yes

#smtp_sasl_password_maps        = hash:/etc/postfix/smtpauth_password

#smtp_sasl_security_options        = noanonymous

#smtp_tls_CAfile                = /etc/postfix/ssl/

#smtp_tls_certfile                = /etc/postfix/ssl/

#smtp_tls_keyfile                = /etc/postfix/ssl/

#smtp_tls_persite                = hash:/etc/postfix/tls_sites

#smtp_use_tls                        = yes

transport_maps                        = hash:/etc/postfix/transport

# --------------------------------------------------------------------







# --------------------------------------------------------------------

# smtp incomming

# --------------------------------------------------------------------

broken_sasl_auth_clients        = yes

disable_vrfy_command                = yes

local_recipient_maps                = $alias_maps,unix:passwd.byname

mydestination                        = $myhostname

mynetworks                        = 127.0.0.0/8

#permix_mx_backup_networks        = hash:/etc/postfix/mx_backup_networks

relay_clientcerts                = hash:/etc/postfix/relay_clientcerts

relay_domains                        = hash:/etc/postfix/relay_domains

relay_recipient_maps                = hash:/etc/postfix/relay_recipient

#relocated_maps                        = hash:/etc/postfix/relocated

smtpd_etrn_restrictions                = reject

smtpd_helo_required                = yes

smtpd_recipient_restrictions        =

        reject_non_fqdn_sender, 

        reject_non_fqdn_recipient,

        reject_unknown_sender_domain,

        reject_unknown_recipient_domain,

        permit_mynetworks,

#        permix_mx_backup,

        permit_sasl_authenticated,

        permit_tls_clientcerts,

        reject_unauth_destination,

        reject_sender_login_mismatch,

#        check_recipient_maps,

        reject_unauth_pipelining,

        reject_invalid_hostname,

        reject_non_fqdn_hostname,

        reject_rbl_client list.dsbl.org,

        reject_rbl_client proxies.blackholes.wirehub.net,

        reject_rbl_client proxies.relays.monkeys.com,

        reject_rbl_client relays.ordb.org,

        permit

smtpd_sasl_auth_enable                = yes

smtpd_sasl_local_domain                = $myhostname

smtpd_sasl_security_options        = noanonymous

smtpd_sender_login_maps                = hash:/etc/postfix/sender_login

smtpd_tls_CAfile                = /etc/postfix/ssl/CAcert.pem

smtpd_tls_cert_file                = /etc/postfix/ssl/cert.pem

smtpd_tls_key_file                = /etc/postfix/ssl/key.pem

smtpd_use_tls                        = yes

swap_bangpath                        = no

#virtual_maps                        = /etc/postfix/virtual

# --------------------------------------------------------------------

It includes a lot of possible features, yet it's not optimized. I will do that next week. I support SMTP AUTH, relaying based on fingerprint of client certificates, RBL, sender address restriction, etc.

You are going to hate me.

what is a virtual domain mail delivery agent?
what is a man page?

Just do man man and man virtual it answers your questions!

I am denied access to /etc/postfix/main.cf

Do you know what that is all about?

Switch to root (su - root) and try again!

Usually root is the only person who can access /etc files. Make sure you are root, or another user who has access to it.

Cool

As for a man page, you open up a terminal and type those commands:
man man
man virtual
And so on. They are manuals on whatever app you are looking up.

Cool

You have been very helpful.

I think I am the root. I typed su - root and nothing happened, I still can't access etc/postfix/main.cf

To find out if you are actually root you can use the program whoami, at the prompt, after you type su -, type:
whoami

And it will return which user you are, or root. If you are root, how are you trying to access the file? If you are trying to edit it, which editor? If you just want to view it, try using less:
less /etc/posfix/main.cf

HTH

Cool