From: Asfihani (asfikcakraweb.co.id)
Date: Sat May 08 2004 - 02:14:34 CDT

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Hello,

Is it possible to add some custom restriction in smtpd based on
message_size_limit, maybe it called check_message_size_limit?
The idea is borrowed from DATABYTES value in qmail which is
exportable, for example based on IP address/network.

Here an example:

smtpd_mumble_restrictions =
    permit_mynetworks
    reject_unauth_destination
    check_message_size_limit hash:/etc/postfix/message_size_limit
    ...

/etc/postfix/message_size_limit:
 # client from 10.0.0.1 max 1024000
 10.0.0.1 1024000
 # userdomain.tld max 2048000
 userdomain.tld 2048000

And yes, the access format is different from access(5) definition.

If I recall correctly, Postfix has implemented this restriction with
creating policy script.

Maybe I'm expecting too much from Postfix, but I think it's easier to
apply without creating another policy :-)

Have nice weekend,

 Asfihani

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