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our exchange front end server is targeted by spammers , as of now we don't have any anti spam solution , we used GFI mail essential but it was expired last week <br />
<br />
1. how to clean spam ques on front-end server , i was using aqadmcli utility tool &amp;&nbsp;delmsg flags all <br />
but affects on my business emails too , please suggest other tools if any <br />
2. how can i prevent spam from now on <br />
3. name the best anti spam software <br />
<br />
thanks 
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our exchange front end server is targeted by spammers , as of now we don't have any anti spam solution , we used GFI mail essential but it was expired last week 

1. how to clean spam ques on front-end server , i was using aqadmcli utility tool & delmsg flags all 
but affects on my business emails too , please suggest other tools if any 
2. how can i prevent spam from now on 
3. name the best anti spam software 

thanks 

how to clean spam messeges que on exchange frontend

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.