Re: [MLUG] flexible e-mail addresses

[Jeremy Hinegardner <EMAIL:PROTECTED>]

>>>>> "Mike" == Mike Miller <EMAIL:PROTECTED> writes:

Mike> I believe that it is possible in some e-mail delivery systems to
Mike> allow users to create an unlimited number of addresses that
Mike> deliver to their account.  The kind of system I have seen is where
Mike> the user has a an address such as EMAIL:PROTECTED but they are
Mike> allowed to augment that address by adding things after the plus
Mike> sign. 

<snip example>

Mike> Does anyone know how this can be accomplished in a Linux system?

Yes it can be done on Linux systems.  Both Qmail and Postfix support
something like this, I have no idea about Sendmail.  I only have a
passing familiarity with Qmail but if you create a .qmail-stuff file in
a users home directory it will act as a .qmail file for EMAIL:PROTECTED

Postfix, which I am more familiar with, has an option
'recipient_delimiter' which you can set to whatever character you want
to separate the user from user-stuff or user+stuff.  It defaults to +, I
changed mine to -.

Mike> Have any of you used it and is it recommended?

I use it all the time, and give out honeypot email addresses to everyone
that asks for an email address in a form.  It also allows me to filter
incoming mail on the To: field.  And, as an additional side bonus, I can
find out if the email address gets sold to a spammer and then I can just
block that particular EMAIL:PROTECTED email address at the SMTP level
using Postfix's check_recipient_access.

Mike> Finally, are spammers hip to the plus sign trick and do they strip
Mike> everything that follows the plus sign before sending their spam?

I have no clue about this.

enjoy,

-jeremy

-- 
========================================================================
 Jeremy Hinegardner                              EMAIL:PROTECTED 


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