Thanks.
On 22/07/15 18:49, Wietse Venema wrote:
Edgaras Luko?evi?ius:
All this is done to put users into our own "classes" (eg. spammers vs.
non-spammers). Because there are clean and dirty IP pools and if we see
that user *may be* abusing email (or any other) system we want to put
them to "dirty" pool for some time. While this works with ordinary
senders, it does not for aliases and spammers are abusing that (we have
a few IP addresses blacklisted by gmail, yahoo, hotmail because of this).
And we do use other means to fight spammers (sender rate, policyd,
quotas, RBLs, FBL, etc., etc.), but that is not enough. Classifying
users to groups already improved quality of our email services and we
would like to improve it further.
You can override the envelope sender with the owner of the alias,
but that feature exists only for alias_maps, not virtual_alias_maps.
/etc/aliases:
# username is a local(8) username.
username: u...@hotmail.com
owner-username: username@your.domain.example
/etc/postfix/main.cf:
# Override the sender with username@your.domain.example
expand_owner_alias=yes
Of course that totally breaks forwarding by ordinaty users and
introduces a possibility for mail delivery errors as they come back
to you.
Wietse
