Sendmail configuration

Jeff Macdonald jeff.macdonald at virtualbuilder.com
Sun Jun 15 22:05:21 EDT 2003


On Sat, 2003-06-14 at 21:27, Bob Bell wrote:
> Can anyone point me to information on the use of "+" in address with
> sendmail (as in "bbell+extrainfo at domain.com")?  I don't know what it's
> called, so it's rather hard to google for.  Or perhaps someone has
> a ready-made solution to my problem?
> 

I've known it as 'plussed users'. But since Derek cited documentation
that's probably the best reference.

> Basically, I want to track the "envelope" destination of the message.
> I've got this somewhat working by putting lines like "rjbell4:
> bbell+rjbell4" in my aliases file.  This somehow sets $1 in my
> procmailrc, though I'm really not clear on how that gets done.  The two
> problems with this approach are (1) double indirection (e.g., postmaster
> -> root -> user ) only keeps the context of the last alias, and (2)
> I don't get $1 for a non-aliased account (if I add "user: user+user",
> then $1 will *always* be "user").

I don't understand what you are trying to do. I use this feature for
SPAM tracking. Every time a website requires an email address I do this:

jeff+<vendor>@virtualbuilder.com

eg: jeff+thinkgeek at virtualbuilder.com

If I get mail addressed to this address that is not from thinkgeek then
I know they've sold my address. I do not need to create an account for
each plussed user because sendmail will first try the plussed address
and if that fails it then it will remove the plussed portion and try
that address.

-- 
Jeff Macdonald <jeff.macdonald at virtualbuilder.com>
My birding blog: http://www.virtualbuilder.com/archives/cat_birding.html
Into birding? Visit http://www.migratus.com
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