MTA preferences for use with MailScanner

Eric Dantan Rzewnicki rzewnickie at RFA.ORG
Thu Aug 5 17:18:00 IST 2004

On Wed, Aug 04, 2004 at 09:43:58AM +0100, Julian Field wrote:
> At 23:46 03/08/2004, you wrote:
> >On Thu, Jul 29, 2004 at 08:38:57AM -0300, Mariano Absatz wrote:
> >> I heard, from knowledgable people, that both Postfix and Exim are
> >> nice, easy to configure and have good documentation and mailing list
> >> support... the only thing that I disliked was when Julian said that
> >> the queue format of Postfix is binary and not plain ASCII... this
> >> scares me a lot since, in a crisis, you aren't able to use your
> >> average set of text tools to resolve it...
> >Is this really true? I know postfix queuefiles don't have linebreaks in
> >them, but does that make them binary?
> Yes. They are basically a sequence of records of the form:
> special-magic-character-denoting-record-type
> string-length-counter-encoded-using-7-bits-per-byte
> record-data
> There are also cross-reference records that supply byte offset counters to
> various other records within the file, all of which have to be correctly
> maintained. Oh, and for good measure all the recipients are listed twice in
> different records (most of the time) and there is envelope information both
> before and after the message body.
> But it does all mean you can have a message more than 2^32 bytes long.
> Where would we be without support for 4.3 terabyte messages?

I see. :-\
thanks for the explanation.

-Eric Rz.

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