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Special Forums Cybersecurity found exploit mailserver through mailq? Post 302271742 by rolandk on Saturday 27th of December 2008 06:27:35 PM
Old 12-27-2008
found exploit mailserver through mailq?

First of all an appeal on all specialists to be understandfull with me, newbie. I have a RaQ 550 that I have to admin bymyself. I have executed mailq and found out that there are mails in the queu that I did not sent. Is someone exploiting my server? Here is an example of the report:

----Q-ID---- --Size-- -----Q-Time----- ------------Sender/Recipient------------
mBRIDxxxxxxx 13270 Sat Dec 27 10:13 Majordomo-Owner@xxx.xxx.net.
(Deferred: Connection timed out with attcanada.net.)
xxx@attcanada.net
mBR7Hvxxxxxxx 12986 Fri Dec 26 23:17 Majordomo-Owner@xxx.xxx.net.
(Deferred: Connection timed out with ifg.com.)
xxx@ifg.com
etc.
I do not have smtp active, only pop. I have activated now POP Authenticated Relaying with my IP through the GUI interface. Would this be enough to prevent exploiting my server for spam?

Last edited by rolandk; 12-28-2008 at 07:40 AM..
 

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mailq(1)						      General Commands Manual							  mailq(1)

NAME
mailq - Displays the contents of the mail queue SYNOPSIS
mailq [-v] DESCRIPTION
The mailq command displays a list of messages in the mail queue. The mailq command is the same as the sendmail command with the -bp option; see sendmail for more information. EXAMPLES
The mailq command lists the mail queue as shown in the following example: Mail Queue (1 request) --QID--- -Size- ---Q- Time------- --Sender/Recipient--- AA002508 3 Thu Dec 17 10:01 root The mailq -v command lists the mail queue as shown in the following example: Mail Queue (1 request) --QID--- -Size- -Priority- ---Q-Time---- -Sender/Recipient- AA002508 3 1005 Dec 17 10:01 root (Output might be formatted differently on your system.) The fields have the following meaning: Contains the message queue ID of the message. Contains the number of bytes in the body of the message (header information not included). Contains the priority of the message. Contains the date that the message entered the queue. Contains the user ID of the sender (first), and then the user ID of the receiver of the message. In this example, a message also indicates the status of the message. FILES
Contains the log file and temporary files associated with the messages in the mail queue. SEE ALSO
Commands: sendmail(8) mailq(1)
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