From: mouss (mlist.onlyfree.fr)
Date: Wed Aug 15 2007 - 19:16:33 CDT

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John Thomas wrote:
>> If you want per sender check, then there is no need for a restriction
>> class. just use smtpd_sender_login_maps.
>
> [Embarrassed that I should know this] Does the above mean:
>
> 1. Add reject_sender_login_mismatch into smtpd_sender_restrictions.
> 2. Add smtpd_sender_login_maps = hash:/etc/postfix/restrict_senders
> 3. Into /etc/posfix/restrict_senders, put ? I don't know what to put,
> sorry.
>

while there is no example in
    http://www.postfix.org/postconf.5.html#smtpd_sender_login_maps
you can get the answer by seeing that the search is performed on an an
email address and that the "result ... or a list of SASL logins ...".

Anyway:

the left-hand side (the key) is an email address. the right-hand side
(result) is a list of logins.

for example:

jjjdomain.example joe,jim,jane

- You'll only rarely need more than one login in the RHS.
- for local domains (mydestination), you can omit the 'domain.example'
part.

Depending on your setup, you may have a list like this:

# local domain setup
joe joe
jane jane
jim jim

or

# virtual domain setup
joedomain.example joedomain.example
janedomain.example janedomain.example
jimdomain.example jimdomain.example

In either case, you can generate the map with a script. If you have a
mysql server running, you can make it generate the "identity" for you
(whether you use mysql to store users or not!).

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