[CentOS] Recommend Mail Server

Robert Moskowitz rgm at htt-consult.com
Tue Nov 24 12:42:51 UTC 2009


Les Mikesell wrote:
> Christopher Chan wrote:
>   
>>     
>>     
>>> Wasn't the last bug found and fixed 5 or 6 years ago?
>>>
>>>   
>>>       
>> Which is great. Just saying that if there is one still lurking around, 
>> the current model of operation might still be vulnerable.
>>     
>
> That was a joke, since you can never know when the last bug is found, 

The last bug is found when the software is sundowned.

Isn't that one of the axioms of software development?


> but I'm 
> comfortable with old code where you know at least some of the bugs have been 
> fixed.
>
>
>   
>>> I've been using it with sendmail for many years.  Postfix has only recently 
>>> added milter support and only very recently made it good enough to work with 
>>> mimedefang.  I don't know if it does the session multiplexing as efficiently - 
>>> maybe...
>>>
>>>   
>>>       
>> I was the under the impression that it was mimedefang that handled that 
>> and not sendmail? In any case, postfix has long had very good multiplexing.
>>     
>
> MimeDefang multiplexes the client calls to the backend handlers, but the model 
> was designed around sendmail.  It might happen to work as well with postfix.
>
>   
>> Ho hum. I do not know why you keep insisting that letting mimedefang 
>> handle say lookups to mysql and perform decisions based on those is 
>> faster than if sendmail had native support. It is after all, one less 
>> layer to going through and not run in something that is interpreted.
>>     
>
> It's not faster for that operation, but compared to database lookups a couple 
> more CPU instructions aren't significant and it is more powerful.  What you get 
> is a point where you can do any additional operations if you want, regardless of 
> whether the MTA author considered it or not.  And, in cases where the program 
> you want to access isn't an already running daemon like mysql, you get a way to 
> run it that doesn't need a 1:1 relationship to the mailer processes.
>
>
>   


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