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Bogus Emails

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Bogus Emails - 4.Sep.2013 8:58:19 PM   
arne

 

Posts: 1
Joined: 4.Sep.2013
Status: offline
Hi Guys,

Ive noticed that there are quite a log of Bogus emails trying to send to out from our Exchange server. These domains are also non existent domains therefore receiving alot of NDR's and keeps retrying. I've checked our Exchange server to ensure its not open to SMTP relay and tests confirmed that via MX Toolbox and Telnet (manually). These emails are definitely SPAM emails but would like to know how this is occurring. We also have a SPAM Filter in place (Mail Marshal) that blocks SPAM. One of the email details are below taken from queue viewer. Any help would be appreciated.

I also ran message tracking for these emails and instead of my own server IP displaying under ServerHostName it has a foreign name "dpuk-vl-lamp08.mars-inc.com"

Identity: Ourserver\120030\3468339
Subject: Undeliverable: How adaptable, flexible and competitive are you?
Internet Message ID: <3810c526-3027-4241-b15c-2bd138b78d2f>
From Address: <>
Status: Ready
Size (KB): 26
Message Source Name: DSN
Source IP: 255.255.255.255
SCL: -1
Date Received: 3/09/2013 12:15:11 PM
Expiration Time: 5/09/2013 12:15:11 PM
Last Error: 400 4.4.7 Message delayed
Queue ID: ourserver\120030
Recipients: sm_14_66_6703+info_++_commschoice.com.au@apj1.smixexpress.com
Post #: 1
RE: Bogus Emails - 9.Dec.2013 6:57:22 AM   
EdwardKayle

 

Posts: 1
Joined: 9.Dec.2013
Status: offline
What are the other alternatives of it? I am just looking forward for the
Google apps security

(in reply to arne)
Post #: 2

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