Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Worried about entries in exchange logs possible forgery or relaying?

Posted on 2007-11-28
7
Medium Priority
?
320 Views
Last Modified: 2013-11-30
This is my first exchange install so forgive any stupid questions. I was browsing through my exchange logs and cam across this entry and a number of others  that seem to be similar. This one worried me a little, it says the the recipient is a yahoo account that is suspened due to forgery. Is this something I should be worried about. and if it is, what can i do to fix it. Thanks so much guys

2007-11-28 11:56:21 124.147.39.208 OutboundConnectionResponse SMTPSVC1 SERVER2007 - 25 - - 220+mta157.mail.kcd.yahoo.co.jp+ESMTP+YSmtp+service+ready 0 0 57 0 609 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionCommand SMTPSVC1 SERVER2007 - 25 EHLO - server2007.mydomain 0 0 4 0 609 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionResponse SMTPSVC1 SERVER2007 - 25 - - 250-mta157.mail.kcd.yahoo.co.jp 0 0 31 0 797 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionCommand SMTPSVC1 SERVER2007 - 25 MAIL - FROM:<>+SIZE=7343 0 0 4 0 797 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionResponse SMTPSVC1 SERVER2007 - 25 - - 250+null+sender+<>+ok 0 0 21 0 1000 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionCommand SMTPSVC1 SERVER2007 - 25 RCPT - TO:<jywvt300gatz@yahoo.co.jp> 0 0 4 0 1000 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionResponse SMTPSVC1 SERVER2007 - 25 - - 553+VS10-RT+Possible+forgery+or+deactivated+due+to+abuse+(#5.1.1)+jywvt300gatz@yahoo.co.jp 0 0 90 0 1203 SMTP - - - -
2007-11-28 11:56:21 124.147.39.208 OutboundConnectionCommand SMTPSVC1 SERVER2007 - 25 RSET - - 0 0 4 0 1203 SMTP - - - -
2007-11-28 11:56:22 124.147.39.208 OutboundConnectionResponse SMTPSVC1 SERVER2007 - 25 - - 250+reset+ok 0 0 12 0 1703 SMTP - - - -
2007-11-28 11:56:22 124.147.39.208 OutboundConnectionCommand SMTPSVC1 SERVER2007 - 25 QUIT - - 0 0 4 0 1703 SMTP - - - -
2007-11-28 11:56:22 124.147.39.208 OutboundConnectionResponse SMTPSVC1 SERVER2007 - 25 - - 221+mta157.mail.kcd.yahoo.co.jp 0 0 31 0 1906 SMTP - - - -
0
Comment
Question by:andrewm123
  • 4
  • 3
7 Comments
 
LVL 104

Expert Comment

by:Sembee
ID: 20369455
It could be simply your server sending out an Out of the Office message to a spam email.
If your server is being abused you can usually tell as there will be a lot of messages stuck in the queues.

Simon.
0
 

Author Comment

by:andrewm123
ID: 20370624
I just looked at the ques and there are about 15 messages stuck. however they are all from the postmaster account, are those non-deliverable messages trying to be sent to spam address?
0
 
LVL 104

Accepted Solution

by:
Sembee earned 2000 total points
ID: 20373427
If the messages are postmaster@ then they could be OOTO messages as I have already outlined. Most spam is spoofed so anything that does auto replies will fail to send correctly. 15 messages is not really a high number. If the server was being abused I would expect it to be 15,000 messages.

Simon.
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Closing Comment

by:andrewm123
ID: 31411416
so should i clear them or let them time out on there own?
0
 

Author Comment

by:andrewm123
ID: 20375933
oops, i meant to add that comment here.
sorry
so i guess i should just let them time out on there owm.
0
 
LVL 104

Expert Comment

by:Sembee
ID: 20376147
If there aren't many of them, then let them timeout. Or you could delete them manually.

Simon.
0
 

Author Comment

by:andrewm123
ID: 20376196
thanks for your help
0

Featured Post

Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Last month Marc Laliberte, WatchGuard’s Senior Threat Analyst, contributed reviewed the three major email authentication anti-phishing technology standards: SPF, DKIM, and DMARC. Learn more in part 2 of the series originally posted in Cyber Defense …
There are literally thousands of Exchange recovery applications out there. So how do you end up picking one that’s ideal for your business & purpose? By carefully scouting the product’s features, the benefits it offers you, & reading ample reviews f…
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…
Whether it be Exchange Server Crash Issues, Dirty Shutdown Errors or Failed to mount error, Stellar Phoenix Mailbox Exchange Recovery has always got your back. With the help of its easy to understand user interface and 3 simple steps recovery proced…
Suggested Courses

571 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question