Using concepts from Postfix documentation, I notice that Luc de Louw's 
Howto handles delivery to Cyrus mailboxes as a "Local Domain" delivery. 
Andrew Koros' Howto handles it as a "Virtual Alias Domain" delivery. 
Postfix's site shows part of an example with a "Virtual Mailbox Domain" 
delivery.

For each of the three cases, some elements of Postfix' main.cf file are 
as follow:

# Local Domain configuration snippet
# Taken from Luc de Louw
# /etc/postfix/main.cf
# ...
mydestination = foo.bar.org, example.com, furchbar-grausam.ch,
   whatever.domain.tld,  mysql:/etc/postfix/mysql-mydestination.cf
virtual_alias_maps = hash:/etc/postfix/virtual, 
mysql:/etc/postfix/mysql-virtual.cf
mailbox_transport = cyrus
# ...

# Virtual Alias Domain configuration snippet
# Taken from Andrew Koros
# /etc/postfix/main.cf
# ...
virtual_alias_domains = proxy:pgsql:/etc/postfix/pgsql-mydestination.cf
virtual_maps=proxy:pgsql:/etc/postfix/pgsql-virtual.cf
mailbox_transport = lmtp:unix:public/lmtp
# ...

# Virtual Mailbox Domain configuration snippet
# Taken from Postfix documentation
# /etc/postfix/main.cf
# ...
virtual_mailbox_domains = example.com ...more domains...
virtual_mailbox_maps = hash:/etc/postfix/vmailbox
virtual_transport = lmtp:unix:/path/name
# ...

I think Virtual Alias Domain delivery is best. virtual_alias_maps should 
be used instead of virtual_maps, as somebody already has written.

Considering a case of Local Domain delivery, shouldn't 
local_recipient_maps be used instead of virtual_alias_maps?

Virtual Mailbox Domain delivery, as hinted in Postfix documentation 
doesn't work for me, unless Cyrus 2.1 mailbox names equal the 
recipients' address prefix, which may not be the case.

What kind of delivery would be most appropiate when using Cyrus 2.2 
virtual domains?

Thanks, Maurice Poisson.

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