postfix and mailscanner

Maarten mailinglists at feedmebits.nl
Wed Dec 13 23:12:03 UTC 2017


How would you be able to tell if this every happened?


On 12/14/2017 12:01 AM, Jerry Benton wrote:
> Technically, it could because when putting back into the Postfix system you
> are dropping it into a directory and not feeding it back in through and
> outgoing milter. I have never seen it happen, but it is technically
> possible. 
>
>
> --
> Jerry Benton
> www.mailborder.com
> +1   (843) 800-8605
> +44 (020) 3883-8605
>
>
> -----Original Message-----
> From: MailScanner
> [mailto:mailscanner-bounces+jerry.benton=mailborder.com at lists.mailscanner.in
> fo] On Behalf Of Antony Stone
> Sent: Wednesday, December 13, 2017 17:59
> To: MailScanner Discussion <mailscanner at lists.mailscanner.info>
> Subject: Re: postfix and mailscanner
>
> On Wednesday 13 December 2017 at 23:36:54, Jerry Benton wrote:
>
>> Because MailScanner does not use a proper milter for Postfix. Instead, 
>> it gets the email from a hold directory and drops it back in the 
>> Postfix queue.
>>
>>
>> This is how it is supposed to work:
>>
>> Postfix > milter > hold > scan > injection to Postfix > delivery
>>
>>
>> This is how it actually works:
>>
>> Postfix > hold > scan > drop into Postfix
>>
>>
>> Technically, this is incorrect.
> That's how it works with sendmail and Exim, too, so why do the postfix
> people say that this "will result in corruption or loss of mail"?
>
> Has this been verified?
>
>
> Antony.
>
>> -----Original Message-----
>> From: MailScanner
>> [mailto:mailscanner-bounces+jerry.benton=mailborder.com at lists.mailscan
>> ner.i
>> n fo] On Behalf Of Maarten
>> Sent: Wednesday, December 13, 2017 17:34
>> To: MailScanner Discussion <mailscanner at lists.mailscanner.info>
>> Subject: postfix and mailscanner
>>
>> Don't want to start a flame war here, but just a question, why does 
>> postfix.org advise against using mailscanner? Saw the following on the 
>> postfix website:
>>
>> mailscanner: system, works with Postfix and other MTAs. WARNING: This 
>> software uses unsupported methods to manipulate Postfix queue files 
>> directly. This will result in corruption or loss of mail. The 
>> mailscanner authors have sofar refused to discuss a proper access API or
> protocol.
>> When reading through mailinglists it seems that some mails can get 
>> lost as in how mailscanner handles mail from the postfix mailqueue, 
>> and that it's safer to use one of the virus/spam/content filters that 
>> that uses the SMTP proxy interface or the Milter Interface. I wouldn't 
>> know if this is true or how to know if any mails every got lost(is 
>> there a way to know of having lost mails), but have there ever been 
>> talks between postfix devs and mailscanner devs about this?
> --
> The first fifty percent of an engineering project takes ninety percent of
> the time, and the remaining fifty percent takes another ninety percent of
> the time.
>
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