>By definition you can't have that in a hashed file, *SQL database, or LDAP. >Other Postfix lookup tables such as regexp or pcre will return the first >match, as documented.
Come to think about it. That makes sense. Sorry about that. So, in the meantime, a dirty workaround is to do it like this then 1. Make sure the transport-map indata file is created in such a fashion that the entries from the "new" mail server is written "first" to the file 2. Do _not_ use the -r option to postmap. 3. Ignore the warnings about dublicate entries, until such a time that the old mail server has been completely archived and decommissioned. After dumping the resulting db-file it would appear that this method (dirty as it may be) only leaves the entry from the "new" mail server in the transport map.
