postfix and mailscanner
jerry.benton at mailborder.com
Wed Dec 13 23:14:17 UTC 2017
You would see corrupted email in Postfix's /var/spool/postfix/corrupt/
directory. Now that I think about it, I have seen corrupted emails before,
but I don't know if that was due to MailScanner or not.
+1 (843) 800-8605
+44 (020) 3883-8605
[mailto:mailscanner-bounces+jerry.benton=mailborder.com at lists.mailscanner.in
fo] On Behalf Of Maarten
Sent: Wednesday, December 13, 2017 18:12
To: MailScanner Discussion <mailscanner at lists.mailscanner.info>
Subject: Re: postfix and mailscanner
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
> +1 (843) 800-8605
> +44 (020) 3883-8605
> -----Original Message-----
> From: MailScanner
> [mailto:mailscanner-bounces+jerry.benton=mailborder.com at lists.mailscan
> 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?
>> -----Original Message-----
>> From: MailScanner
>> [mailto:mailscanner-bounces+jerry.benton=mailborder.com at lists.mailsca
>> 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
>> 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.
> Please reply to the
> *don't* CC me.
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