May I should explain a bit more what i want to do..
I'm migrating my mail system from an old, buggy, Groupwise system to
Postfix. The migration will take several month as I can't migrate all
users at the same time.
I want the following behaviour: all migrated users use the Postfix to
send mails. On Postfix, if the user does not exist (ie, the mailbox is
still on the Groupwise system), so i want to configure Postif to send
the mail to Groupwise if he does not know the user.
Blaise
Brian Evans - Postfix List wrote:
Blaise Hurtlin wrote:
Hi,
I'm trying to configure my new Postfix system. I have all my users in
a LDAP and use virtual mailbox.
I need the following behaviour:
- Existing users in LDAP => delivered locally (this part works fine)
- Non-existing users => relay to another SMTP
Any idea how to do that ? thanks..
Blaise
Don't blindly accept mail that can be rejected in a relay. This causes
Backscatter and is frowned upon.
You need to know at the Gateway which addresses are valid.
Techniques to do this include relay_recipient_maps and
'check_recipient_access hash:/path/to/rcpt_map'
The first is used if you KNOW who is valid. The second is used if you
don't with the following contents: 'subdomain.example.com
reject_unverified_sender'
All of this is speculation without 'postconf -n'.
Brian
