Linux TCP/IP, GreenIT and more…
Another tricky error after Debian squeeze upgrade:
ERROR: Wrong ‘suhosin.session.encrypt’ option value. Read REQUIREMENTS section in INSTALL file or use Roundcube Installer, please!
The fix is very trivial:
1 2 3 4 | vim /etc/php5/apache2/php.ini # Add this lines to the bottom of the config: [suhosin] suhosin.session.encrypt = Off |
I upgraded my Mail-server to Debian 6 – squeeze, it was everything great till I started my Thunderbird and get this Message: Filesystem notification initialization error — contact your mail administrator (check for configuration errors with the FAM/Gamin library)
This error can be seen in your mail client and is often caused by Courier. If you are the administrator of the mail server, simply install libgamin instead of libfam as follows:
1 | aptitude install gamin |
Now restart all courier services:
1 | find /etc/init.d/ | grep courier | while read line; do $line restart; done |
There are many configuration options with inpact on performance in Roundcube and behind it (Database and Webserver). As Roundcube installation administrator you can set them to some defaults and prevent users to change them by using the ‘dont_override‘ option.
I tested some options and created my tiny boost list.
Here’s the list of options with impact on performance
Messages listing is a main task of a mail client. Sorting is expensive. First of all you should use an IMAP server with SORT capability. If message list displaying is still too slow you should set ‘message_sort_col’ to an empty string.
‘message_sort_col’
Continue reading ‘Roundcube performance’
Sometimes it’s interesting to test some MTA’s and their spam behavior, every mail system has his own spam behavior like SPAM_MARK_LEVEL or SPAM_REJECT_LEVEL.
If you send a mail with GTUBE string your mail should be rejected.
1 | rejected after DATA: This message scored 1000.0 spam points |
The GTUBE String to test spam rejection of mail servers:
1 | XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X |
In this how to I describe the basically configuration and administration of Postfix on Debian Lenny.
Current I’m using Postfix version 2.5.5
This tutorial should working with older and newer versions.
1 2 | postconf -d | grep "mail_version =" | cut -d" " -f 3 2.5.5 |
You can find the postfix main configuration file under “/etc/postfix”
Let see what wee need to configure a working Internet Mail-Server
1 | postfix ~ # vim /etc/postfix/main.cf |
My example configuration:
1 2 3 4 5 6 7 8 9 10 11 12 13 | myhostname = ipv6.postfix.idrobot.net alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = ipv6.postfix.idrobot.net, localhost.localdomain, localhost mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 smtp_bind_address6 = 2a01:4f8:101:265::37 mailbox_command = mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = all home_mailbox = Maildir/ bounce_template_file = /etc/postfix/bounce.cf |
If you want to relay your mails to another mail-server you can use the relayhost option:
Edit main.cf, and add this line:
1 | relayhost = ipv6.mx.idrobot.net |
Some administration commands:
Show running config:
1 | postconf -n |
Show the default postfix config instead of running one:
1 | postconf -d |
Show message content:
1 | postcat -q 7FB942082 |
Delete all mail in queue:
1 | postsuper -d ALL |
Schedule immediate delivery:
1 | postqueue -i 7FB942082 |
Flush the queue:
1 | postqueue -f |