MailScanner SMTP question

Julian Field MailScanner at
Wed Mar 8 19:15:16 GMT 2006

Hash: SHA1

Scott Silva wrote:
> Julian Field spake the following on 3/6/2006 3:00 AM:
>> The one thing you can do to alleviate this with MailScanner is to use  
>> the "IPBlock" code within It only works with  
>> sendmail, if I remember correctly. You can put the maximum limit of  
>> email messages per hour that you accept from a domain or a block of  
>> IP addresses. Once it gets more messages that that from an address  
>> (or IP) it starts telling sendmail to block mail from that address.  
>> Once an hour the counters are reset.
>> Not many people use this, which is why it isn't a core feature, but  
>> the person who asked me to write it makes great use of it.
>> Fundamentally, this is really a job for you MTA, and not MailScanner  
>> at all. If you are using sendmail, then there are milters such as  
>> milter-ahead which will check the addresses it receives are real on  
>> your system, and rejects all messages that are being delivered to non- 
>> existent addresses. It is a lot faster than you might think it would  
>> be, as it does lots of caching, and it will reject a message long  
>> before the content of the message is transmitted. Thoroughly  
>> recommended. There are mailing list postings and Wiki pages that will  
>> tell you how to do something similar on other MTAs.
>> On 6 Mar 2006, at 03:19, Laurent Dinclaux wrote:
> Is there a free equivalent to Milter-ahead? Or does my copy I got "before" it
> wasn't free still work?
He doesn't charge much, does he? I thought it was something like a 
nominal $99? How much is your time worth implementing something else?

- -- 
Julian Field
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