postfix and mailscanner

[Jerry Benton]

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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