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Spam Mail

This few days my users found that a lot of spam mail in our exchange server .Our domain name is abc.com ,i can see that some of the unknown user like 123@abc.com....send the spam mail to my user like realusers@abc.com. Please advice what going wrong.
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YaYangTeah
Asked:
YaYangTeah
2 Solutions
 
Radhakrishnan RITCommented:
Hi,
Are you using any spam filter for exchange? I.e-Symantec mail security for exchange.  If so, look at the license status and see whether it's expired?
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Wayne HerbertIT SpecialistCommented:
That is called email address spoofing... making it look like email originates from within your domain.  If you check the email headers, you'll see that the sending email server will not be your domain server but probably one that does not exist or is found in China.
 
One thing spammers are doing is using the CEO's address when spoofing to try and make the email legitimate enough that the employee will click on the link or document that delivers the malware payload.
 
As Radhakrishnan says, you need a good third party email spam control program.  I use OnlyMyEmail... simply excellent.  I am in no way affiliated with the company except as a satisfied user.  My boss would readily pay double, it's so much better than the others.
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madunixChief Information Security Officer Commented:
Email spamming is a variant of bombing and refers to sending email to hundreds or thousands of users, May be combined with email spoofing, which alters the identity of the account sending the message, making it more difficult to determine from whom the email is coming.  Make sure you have Antivirus and Antispam software are necessary to detect, contain and notify whenever malicious code is detected.
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YaYangTeahAuthor Commented:
Today I found that our Symantec Mail Security services is stopped that could be a reason having the mail spoofing issue.

May I Know how to avoid this issue if without Mail Security  ?
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Radhakrishnan RITCommented:
Hi,
Without mail security exchange can't handle the spam fully
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Wayne HerbertIT SpecialistCommented:
May I Know how to avoid this issue if without Mail Security  ?

Get a better anti-spam package.  I am no fan of Symantec or McAfee even when it is allegedly up and running... too much spam through the sieve and too many false positives.
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