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Delete mail queue from or to a specific email address

Some times, you may need to delete mail queue from or to a specific email address in your Postfix mail server.   For example, if  you get spam attack that fills your server with a lot of emails from the same sender email address or to the same recipient email address, you need to clean those emails from your mail queue.

Manually deleting those email is very time consuming.  Here are the step to clean those email with one single command:

for i in `/usr/sbin/postqueue -p|grep 'user@domain.com' |awk {'print $1'}|grep -v 'user@domain.com'`; do /usr/sbin/postsuper -d $i ; done

This command will delete mail queue from or to user@domain.com.  To check current mail queue, run this command:

/usr/sbin/postqueue -p

Your mail queue will be much shorter.

Installing Exchange Server 2007 SP2

Microsoft has released service pack 2 for exchange server 2007 on August 24th, 2009.  It is available for download here.  Exchange 2007 SP2 includes many new features.  You can find the complete list of SP2 new features in You Had Me At EHLO blog.  One thing I like most is :

• Exchange Volume Snapshot Backup Functionality - A new backup plug-in has been added to the product that will enable customers to create Exchange backups when a backup is invoked through the Windows Server 2008 Backup tool.

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Error moving default offline address book generation server

I got an error when I try to move default offline address book generation server to other server.  The original OAB generation server cannot be found.  It was a testing server that was accidently deleted after migration process.  To solve this problem, I need to delete the old default OAB, create new default OAB, specify the new default OAB as the OAB for all mailbox database.

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How to uninstall Exchange Server 2007

There are some prerequisites need to be meet before you can uninstall Exchange Server 2007 from a server.   Completely removing this Exchange 2007 server from a server will includes removing all server roles, all installation files, and the Exchange server object and all its child objects from the Active Directory directory service. More »

Only disconnected mailboxes can be reconnected

This article explain about how to solve a problem of a disconnected mailbox that cannot be removed because the MaiboxGuid exist twice. The MailboxGuid of the disconnected mailbox is the same as the MailboxGuid of other active mailbox in different database. This problem arise when I disabled a mailbox of a user, created new mailbox for that user and moved the mailbox to other mailbox database. More »

Remove disconnected mailboxes in Exchange 2007

In Exchange 2007, there are two options to delete a mailbox:
1.  Remove Mailbox
2.  Disable Mailbox
If you remove a mailbox, the mailbox data that is stored in the Exchange mailbox database is marked for deletion and the associated user account is also deleted from Active Directory. If you disable a mailbox,  the user account is retain, it will only disassociate the mailbox data from the user account.

Exchange retain disconnected mailboxes in the mailbox database based on the deleted mailbox retention settings configured for that mailbox database. In Exchange 2007, the default retention period is 30 days.  During this time, the disconnected mailbox can be recovered by associating it with an existing Active Directory user account.  After the specified retention period, a disconnected mailbox is permanently deleted from the Exchange mailbox database. More »

How to update the Disconnected Mailbox list in Exchange 2007

Sometimes, we need to delete/remove a mailbox from one user account and reconnect it to other user account. When we delete/remove mailbox from Exchange 2007, we can’t see it immediately in the Disconnected Mailbox list under Recipient Configuration.  In Exchange 2007, there is no GUI facility like “Run Clean Up Agent” in Exchange 2003.

To update the Disconnected Mailbox list, we need to use cmdlet in the Exchange Management Shell.  Use the Clean-MailboxDatabase cmdlet against the mailbox database it was in.

Here is how to do it:

1.  First, let’s list the Mailbox Databases that we have using the Get-MailboxDatabase cmdlet.

[PS] C:\> Get-MailboxDatabase

Name                Server        StorageGroup            Recovery
----                ------        ------------            --------
Mailbox Database    Server1       First Storage Group     False
Executive Database  Server1       Second Storage Group    False
Mailbox Database    Server2       First Storage Group     False
Partner Database    Server2       Second Storage Group    False

2.  Clean up the database.  To clean up specific database on specific server, use these cmdlet:

[PS] C:\> Clean-MailboxDatabase “Server1\Mailbox Database”

[PS] C:\> Clean-MailboxDatabase “Server2\Partner Database”

After running the cmdlet you will see the disconnected mailbox in the Disconnected Mailbox list.

Tags: disconnected mailbox, Exchange server

550 5.7.1 Client does not have permissions to send as this sender

When configuring the receive connector in Exchange 2007,  I find out that users using SMTP email client like Outlook Express and Thunderbird can receive email but cannot sent email through Exchange as the SMTP server. They get the following error:

“Protocol: SMTP, Server Response: ‘550 5.7.1 Client does not have permissions to send as this sender’, Port: 25, Secure(SSL): No, Server Error: 550, Error Number: 0×800CCC78″

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Frequently Used Zimbra CLI

The Zimbra administration console is usually used as the mail tool for configuring and maintaining Zimbra.  But actually, some Zimbra function can only be changed using the Command Line Interface (CLI) utility. More »

Redirect HTTP to HTTPS in Zimbra

In Zimbra we have the options to log on using HTTP or HTTPS.
Using zmtlsctl command, we can set the Web server mode to the communication protocol options: More »