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MTA, MUA, Qmail, Exchange, Exim, Postfix, Sendmail, Courier, Mirapoint, Vpopmail, pop3, smtp, imap

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 Post subject: Postfix: Hide MUA (x-mailer|user-agent) information from mail header
PostPosted: Mon Jan 26, 2015 6:40 pm 
Based on previous post Postfix MTA - How to mask real ip in mail headers, postfix can also remove other headers that reveal the mail user agent information, such sh "X-Mailer" or "User-Agent".

To remove these headers, open postfix "headers_check" configuration file and add below two lines:
Code:
/^X-Mailer:.*/ IGNORE
/^User-Agent:.*/ IGNORE
And reboot postfix.

Read more : Postfix: Hide MUA (x-mailer|user-agent) information from mail header | Views : 1747 | Replies : 0

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 Post subject: qmail + qmail-scanner - qmail-inject: fatal: qq temporary problem / clamdscan: corrupt or unknown
PostPosted: Tue Jan 20, 2015 5:18 pm 
This article treats the following qmail, qmail-scanner and calmav errors:
mail qmail-scanner/clamav qmail-inject: fatal: qq temporary problem / clamdscan: corrupt or unknown clamd scanner error or memory/resource/perms problem - exit status 512/2

Code:
# ./test_installation.sh -doit
QMAILQUEUE was not set, defaulting to /var/qmail/bin/qmail-scanner-queue.pl for this test...

Sending standard test message - no viruses...
done!

Sending eicar test virus - should be caught by perlscanner module...
qmail-inject: fatal: qq temporary problem (#4.3.0)
Bad error. qmail-inject died


Trying ...

Read more : qmail + qmail-scanner - qmail-inject: fatal: qq temporary problem / clamdscan: corrupt or unknown | Views : 1672 | Replies : 0

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 Post subject: Postfix MTA - How to hide real ip in mail headers.
PostPosted: Mon Jan 19, 2015 7:24 pm 
This is a regular problem that companies are facing specially when they want a degree of anonimity that protects their services from being denial of service attacked.Every CDN network out there offers anonimity and protection for web services, this means HTTP and HTTPS, but not for mail services.

This means that all your web clients will connect to the CDN edge servers and these servers provide the content. If your website is under attack, the ...

Read more : Postfix MTA - How to hide real ip in mail headers. | Views : 4125 | Replies : 0

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 Post subject: Bind DNS master to slave fails to synchronize when all configuration is ok
PostPosted: Wed Nov 14, 2012 6:49 am 
If you're configuring a master/slave DNS system and synchronization fails, look in bind logs (linux /var/log/daemon.log) for following messages:
Code:
Nov 14 11:25:53 server named[1073]: zone 176-191.216.51.81.in-addr.arpa/IN/external: refresh: failure trying master 10.1.22.2#53 (source 172.16.0.58#0): clocks are unsynchronized


Make sure both nodes are time synchronized using date and ntpq -pn commands.

Read more : Bind DNS master to slave fails to synchronize when all configuration is ok | Views : 477 | Replies : 0

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 Post subject: Postfix change message size limit
PostPosted: Tue Aug 10, 2010 6:31 pm 
Code:
message_size_limit = 20480000
Controlls the limit of each SMTP message submitted to a postfix smtp server.

The above example sets the limit of a mail message to 20MB.

Read more : Postfix change message size limit | Views : 462 | Replies : 0

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 Post subject: Squirrelmail: increase the size of compose textarea - How to
PostPosted: Fri Sep 04, 2009 4:53 am 
By default, squirrelmail's compose page contains a small textarea to write the body of your email. Here is how to increase it's height or size (number of columns):

First, open the src/compose.php file with your favourite editor and search for textarea:


if ($compose_new_win == '1') {
echo ' <tr >' . "\n" .
' <td bgcolor="' . $color[0] . '" colspan="2" align="center">' . "\n" .
' <textarea name="body" id="body" rows="' . (int)$editor_height .
'" ...

Read more : Squirrelmail: increase the size of compose textarea - How to | Views : 473 | Replies : 0

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 Post subject: Squirrelmail attachments error "Could not move/copy file. File not attached"
PostPosted: Tue Sep 01, 2009 3:32 pm 
If you get this errors in Squirrelmail "Could not move/copy file. File not attached" when trying to attach a file, it is not the php.ini upload_tmp_dir setting, but the attachment.

Check this directory and, if doesn't exist, create it with proper permissions (usually apache's user & group)/
Go to squirrelmail configuration (execute config/conf.pl script) and choose option 4 - Generatl Options:
SquirrelMail Configuration : Read: config.php (1.4.0)
---------------------------------------------------------
Main Menu --
1. Organization Preferences
2. ...

Read more : Squirrelmail attachments error "Could not move/copy file. File not attached" | Views : 995 | Replies : 0

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 Post subject: Spamassassin sa-update complains about not installed modules
PostPosted: Tue Sep 01, 2009 10:32 am 
Spamassassin is a perl based mail filter. It requires serveral perl modules, as you can see below.

At installation and startup time, spamassassin does not request all of them, but sa-update the spamassassin update tool does:


# sa-update -D
[26491] dbg: logger: adding facilities: all
[26491] dbg: logger: logging level is DBG
[26491] dbg: generic: SpamAssassin version 3.2.5
[26491] dbg: config: score set 0 chosen.
[26491] dbg: dns: no ipv6
[26491] dbg: dns: is ...

Read more : Spamassassin sa-update complains about not installed modules | Views : 2034 | Replies : 0

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