Letzte Änderung am 2006-09-12 13:02:54 von HJH
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Postfix Postfix mailserver configuration
Troubleshooting
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Postfix Postfix mailserver configuration
Troubleshooting
Editiert am 2006-09-12 13:02:29 von HJH
Erweiterungen:
Postfix Postfix mailserver configuration
#Most of the above settings are to make it harder for spam to get in. They are well documented on the internet, so I wont comment on them here. Only the helo thing: helo is sent by all servers; spammers sometimes also spoof this. If you see a pattern in your /var/log/mail.info in the helo of a spammer, just fill out that helo in /etc/postfix/helo_access, run
Löschungen:
Postfix Postfix mailserver configuration
#Most of the above settings are to make it harder for spam to get in. They are well documented on the internet, so I wont comment on them here. Only the helo thing: helo is sent by all servers; spammers sometimmes also spoof this. If you see a pattern in your /var/log/mail.info in the helo of a spammer, just fill out that helo in /etc/postfix/helo_access, run
Editiert am 2006-09-12 00:43:06 von HJH
Erweiterungen:
Troubleshooting
Löschungen:
Troubleshooting
Editiert am 2006-09-12 00:39:14 von HJH
Erweiterungen:
Troubleshooting
On firewalls: Open port 25 for your mailserver
Check whether your ISP lets you use an e-mail server. A lot of ISP's closed off port 25 on their networks!
Editiert am 2006-09-11 23:36:38 von RoEn faselifting
Erweiterungen:
Postfix Postfix mailserver configuration
To install postfix, do:
Set it up the way you want, but don't worry: if you are not sure about settings, you can always run it again with
Because you also want to keep out SPAM, also install postgrey:
I'm not going to comment on the postgrey settings, as the defaults are fine. The only thing you might want to do, is to exclude certain mailservers from postgrey. Look in /etc/postgrey/ to whitelist servers.
All IP's are blanked out, just as hostnames, this is the file /etc/postfix/main.cf:
End of the main.cf file.
#Most of the above settings are to make it harder for spam to get in. They are well documented on the internet, so I wont comment on them here. Only the helo thing: helo is sent by all servers; spammers sometimmes also spoof this. If you see a pattern in your /var/log/mail.info in the helo of a spammer, just fill out that helo in /etc/postfix/helo_access, run
postmap /etc/postfix/helo_access
and your settings will be activated. Below is an example of a helo_access file:
After changing your settings in main.cf, you need to restart postfix:
If you are having issues, the first thing to do is to look in /var/log/mail.info, /var/log/mail.warn , /var/log/mail.err. These files usually tell you what's wrong with your current setup.
When a setting you just changed, looks unchanged in postfix, look in /var/spool/postfix/etc. In this folder postfix keeps its config, as it is a chrooted service. Update settings here if needed.
Löschungen:
To install postfix, do: "apt-get install postfix"
Set it up the way you want, but don't worry: if you are not sure about settings, you can always run it again with "dpkg-reconfigure postfix".
Because you also want to keep out SPAM, also install postgrey: "apt-get install postgrey"
I'm not going to comment on the postgrey settings, as the defaults are fine. The only thing you might want to do, is to exclude certain mailservers from postgrey. Look in "/etc/postgrey/" to whitelist servers.
All IP's are blanked out, just as hostnames, this is the file "/etc/postfix/main.cf":
[code]
- invalid_hostname
[/code]
#End of the main.cf file.
#Most of the above settings are to make it harder for spam to get in. They are well documented on the internet, so I wont comment on them here. Only the helo thing: helo is sent by all servers; spammers sometimmes also spoof this. If you see a pattern in your /var/log/mail.info in the helo of a spammer, just fill out that helo in "/etc/postfix/helo_access", run "postmap /etc/postfix/helo_access" and your settings will be activated. Below is an example of a "helo_access" file:
[code]
sina.com REJECT
[/code]
After changing your settings in main.cf, you need to restart postfix: "postfix reload"
If you are having issues, the first thing to do is to look in "/var/log/mail.info" , "/var/log/mail.warn" , "/var/log/mail.err". These files usually tell you what´s wrong with your current setup.
When a setting you just changed, looks unchanged in postfix, look in "/var/spool/postfix/etc" In this folder postfix keeps its config, as it is a chrooted service. Update settings here if needed.
Editiert am 2006-09-11 23:17:59 von HJH
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Editiert am 2006-09-11 23:16:43 von HJH
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Löschungen:
Editiert am 2006-09-11 23:16:20 von HJH
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Postfix mailserver configuration
älteste bekannte Version dieser Seite wurde bearbeitet am 2006-09-11 23:14:43 von HJH [ ]
Postfix mailserver configuration
To install postfix, do: "apt-get install postfix"
Next, you will be guided thru a wizard.
Set it up the way you want, but don't worry: if you are not sure about settings, you can always run it again with "dpkg-reconfigure postfix".
Because you also want to keep out SPAM, also install postgrey: "apt-get install postgrey"
I'm not going to comment on the postgrey settings, as the defaults are fine. The only thing you might want to do, is to exclude certain mailservers from postgrey. Look in "/etc/postgrey/" to whitelist servers.
Below is a basic setup for a mailserver with internet access.
All IP's are blanked out, just as hostnames, this is the file "/etc/postfix/main.cf":
[code]
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
delay_warning_time = 4h <-Set this because it is a bit below standard, and I want an early warning
myhostname = mail.mydomain.com
mydomain = mydomain.com
alias_maps = hash:/etc/aliases
#alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = machinename.mydomain.com, localhost.mydomain.com, localhost, mydomain, mail.mydomain.com <- I use mail.mydomain.com as standard mx record setting. You could also use smtp.mydomain.com (or anything else), but you also have to set that here then.
mynetworks = 127.0.0.0/8 192.168.1.0/8 <external IP>
home_mailbox = Maildir/ <- use something without a "/" on the end here, if you use mailfiles and not folders!
#mailbox_command = procmail -a "$EXTENSION"
mailbox_command = /usr/bin/maildrop <- this one is for mailfolders; for mailfiles, use the line outcommented above this one.
mailbox_size_limit = 0 <- set this if you want people to use only a limited size mailbox
recipient_delimiter = +
inet_interfaces = all <- could be only on a specific interface (i.e.
eth0,
lan0?,
net0?)
smtpd_banner=$myhostname ESMTP $mail_name (
MyCompanyname?)
debug_peer_level=3
sendmail_path = /usr/sbin/sendmail.postfix
virtual_maps = hash:/etc/postfix/virtual <- only if you use virtual domains; in that case don't forget to create a file "virtual"
smtpd_recipient_restrictions = permit_mynetworks
- unauth_destination
- policy_service inet:127.0.0.1:60000 <- the postgrey filter; automatically added by postgrey installation
# Defines who can send a message thru this server
smtpd_sender_restrictions = permit_mynetworks
- mx_backup
- unauth_pipelining
- unknown_sender_domain
- unverified_sender
smtpd_client_restrictions = permit_mynetworks
- mx_backup
- unauth_pipelining
smptd_delay_reject = yes
smptd_helo_required = yes
smtpd_helo_restrictions = check_helo_access hash:/etc/postfix/helo_access
- invalid_hostname
[/code]
#End of the main.cf file.
#Most of the above settings are to make it harder for spam to get in. They are well documented on the internet, so I wont comment on them here. Only the helo thing: helo is sent by all servers; spammers sometimmes also spoof this. If you see a pattern in your /var/log/mail.info in the helo of a spammer, just fill out that helo in "/etc/postfix/helo_access", run "postmap /etc/postfix/helo_access" and your settings will be activated. Below is an example of a "helo_access" file:
[code]
G4SERVER REJECT
hosting4u?.co.kr REJECT
kkqg REJECT
friend REJECT
localhost REJECT
localhost.localdomain REJECT
sina.com REJECT
[/code]
After changing your settings in main.cf, you need to restart postfix: "postfix reload"
If you are having issues, the first thing to do is to look in "/var/log/mail.info" , "/var/log/mail.warn" , "/var/log/mail.err". These files usually tell you what´s wrong with your current setup.
When a setting you just changed, looks unchanged in postfix, look in "/var/spool/postfix/etc" In this folder postfix keeps its config, as it is a chrooted service. Update settings here if needed.
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