11 Quota Exceedance Notifications

If you want to get notifications about all the email accounts that are over quota, then do this:

cd /usr/local/sbin/
wget http://puuhis.net/vhcs/quota.txt
mv quota.txt quota_notify
chmod 755 quota_notify

Open /usr/local/sbin/quota_notify and edit the variables at the top. Further down in the file (towards the end) there are two lines where you should add a % sign:

vi /usr/local/sbin/quota_notify

[...]
my $POSTFIX_CF = "/etc/postfix/main.cf";
my $MAILPROG = "/usr/sbin/sendmail -t";
my $WARNPERCENT = 80;
my @POSTMASTERS = ('postmaster@yourdomain.tld');
my $CONAME = 'My Company';
my $COADDR = 'postmaster@yourdomain.tld';
my $SUADDR = 'postmaster@yourdomain.tld';
my $MAIL_REPORT = 1;
my $MAIL_WARNING = 1;
[...]
           print "Subject: WARNING: Your mailbox is $lusers{$luser}% full.\n";
[...]
           print "Your mailbox: $luser is $lusers{$luser}% full.\n\n";
[...]

Run

crontab -e

to create a cron job for that script:

0 0 * * * /usr/local/sbin/quota_notify &> /dev/null

(Note (a little off-topic): on Debian crontab -e will automatically open the editor nano. If you are used to working with the editor vi (like me), run the following commands:

rm -f /etc/alternatives/editor
ln -s /usr/bin/vi /etc/alternatives/editor

Afterwards, run crontab -e, and vi will come up.)

12 Test Postfix

To see if Postfix is ready for SMTP-AUTH and TLS, run

telnet localhost 25

After you have established the connection to your Postfix mail server type

ehlo localhost

If you see the lines

250-STARTTLS

and

250-AUTH LOGIN PLAIN

everything is fine:

server1:/usr/local/sbin# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 server1.example.com ESMTP Postfix (Debian/GNU)
ehlo localhost
250-server1.example.com
250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN PLAIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN
quit
221 2.0.0 Bye
Connection closed by foreign host.
server1:/usr/local/sbin#

Type

quit

to return to the system shell.

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