Hi Wietse, thank you for your answer. Specify multiple IP for one domain name semms a bit tricky to me, so i'll go the way described by Jarek (set up local MX records).
two more questions :-): 1) as described in Postfix Documentation, the "transport_maps", where is defined something like: domain.tld smtp:[IP_of_primary_MDA] ...the brackets means no MX lookups - is it, the "no MX lookups", ok? 2) I'm not sure if there should be in transport maps set up the exact IP of primary MDA. If im asking notoriously well known things, can you please point me to corresponding documentation part? Thanks hor help, Jiri Wietse Venema napsal(a): Ji?? Hlinka: Hi Jarek, thanks for fast reply! Define secodnary MX record for the secondary MDA is one of a posiibilities :-), but i still hope there is simpler solution, something like adding another IP (the IP of secondary MDA) on each line of transport_maps :-). The transport_maps take only one name or address as destination. However, you can specify a name that resolves into multiple addresses. For example, a name that has multiple lines in /etc/hosts, or a name that has multiple records in DNS. Wietse