Am 31.05.2011 16:55, schrieb Patrick Riehecky: > That is curious Postfix seems to be automatically determining your domain as > 'localdomain', exactly as your reported. If I continue to guess, and this is > firmly in the guest camp, I'd guess that postfix postfix doesn't like '.local' > as a tld. The default in postfix 2.3 and later is to revert to 'localdomain' > when it doesn't know the domain ( > http://www.postfix.org/postconf.5.html#mydomain ). Since .local isn't reserved > as an official tld, this is my best theory for explaining the behaviour. I changed the domain to our ".de" domain we use in productive environments in all relevant configs and reboot (just to be sure that it's live). But still "localdomain". Is there a quick way, I can see what gethostname() returns?