I would think about using the transport file for this. It's pretty
flexible. Check the docs, but I found this:
*"TABLE SEARCH ORDER*
With lookups from indexed files such as DB or DBM, or from networked
tables such as NIS, LDAP or SQL, patterns are tried in the order as
listed below:
/user+extension@domain transport/:/nexthop/
Deliver mail for/user+extension@domain/ through/transport/
to/nex-/
/thop/.
On 3/6/19 12:34 PM, Samuel Torton wrote:
Hi,
I have a postfix server configured as a incoming mail relay for my
customers.
One of my customers has several domain names: domain1.com (main),
domain2.com, domain3.com, domain4.com.
My server can receive emails on whatever domain1/2/3/4.com, but can
accept emails for declared email addresses only (relay_recipients),
and rejects others non declared.
Here is a part of my /etc/postfix/main.cf:
++++
…
virtual_alias_maps = hash:/etc/postfix/virtual
relay_recipient_maps = hash:/etc/postfix/relay_recipients
transport_maps = hash:/etc/postfix/transport
…
++++
Here is my /etc/postfix/virtual:
++++
…
@domain2.com @domain1.com
@domain3.com @domain1.com
@domain4.com @domain1.com
…
++++
Here is my /etc/postfix/relay_recipients:
++++
…
us...@domain1.com x
us...@domain1.com x
us...@domain1.com x
us...@domain1.com x
…
++++
Here is my /etc/postfix/transport:
++++
…
domain1.com smtp:[10.10.10. 1]
…
++++
Now, here are several scenarios happening on my server:
1/ Receiving email for us...@domain1.com <mailto:us...@domain1.com> à
OK, relayed to 10.10.10.1 (for us...@domain1.com
<mailto:us...@domain1.com>)
2/ Receiving email for unkn...@domain1.com
<mailto:unkn...@domain1.com> à OK, rejected
3/ Receiving email for us...@domain2.com <mailto:us...@domain2.com> à
OK, relayed to 10.10.10.1 (for us...@domain1.com
<mailto:us...@domain1.com>)
4/ Receiving email for unkn...@domain2.com
<mailto:unkn...@domain2.com> à relayed to 10.10.10.1 (for
unkn...@domain1.com <mailto:unkn...@domain1.com>) !!! à and the
destination mail server will reject it
I’m happy with the scenarios 1/ 2/ 3/.
I’m NOT happy with the scenario 4/.
As I understand, the combination of virtual + relay_recipients files
doesn’t work efficiently: if an email is sent to
whatever@domain2/3/4.com, the relay_recipients file is bypassed by the
virtual file, and the email will be automatically relayed to
whate...@domain1.com on 10.10.10.1 without checking the relay_recipients.
Do you have any solution / hint to avoid this ?
If possible, I would like to avoid writing a list of all my user
mailbox @ all domain names neither in virtual, nor in relay_recipients
file.
Thanks a lot for your help.
Samuel
--
Best Regards Curtis Maurand
mailto:cur...@maurand.com
