[TriLUG] mailman/postfix integration problem with bounce-processing

[Tanner Lovelace]

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Mike Johnson wrote:
| Christopher L Merrill [chris at webperformanceinc.com] wrote:
|
|
|>This, honestly, doesn't suprise me.  I don't see how they could possibly
|>be delivered with that addressing scheme.  Is there some special wildcard
|>processing that should be enabled in Postfix to allow those addresses
|>to be resolved to the "test-bounces" address that appears in the mailman
|>aliases file?
|
|
| Yes, look at this setting in main.cf:
| # ADDRESS EXTENSIONS (e.g., user+foo)
| #
| # The recipient_delimiter parameter specifies the separator between
| # user names and address extensions (user+foo). See canonical(5),
| # local(8), relocated(5) and virtual(5) for the effects this has on
| # aliases, canonical, virtual, relocated and .forward file lookups.
| # Basically, the software tries user+foo and .forward+foo before
| # trying user and .forward.
| #
| # recipient_delimiter = +
|
| Mike
|

Note also, that while + is widely used, it isn't the same on all
systems.  Qmail, for example, uses "-" as it's delimiter.  That's
the main reason I've setup postfix to use "-" (since I used to
run qmail and didn't want to lose all the e-mail addresses I've
accumulated over the years).

The recipient delmiter is a very good way of tracking spam.  Say,
for instance I give my e-mail address to a website.  I always
add a tag on the end that identifies that website.  Then, later
on if I get spam with that tag I know exactly where it came from.

I believe its even possible to get postfix to recognize both
+ and - and delimiters but you need to dig into postfix's regular
expression engine to do so.  If anyone's interested in that, I'd
suggest searching the postfix mailing lists.  That's where I saw
it several months ago.

Cheers,
Tanner
- --
Tanner Lovelace | lovelace(at)wayfarer.org | http://wtl.wayfarer.org/
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