martin schmitt schmitt systems gicscsyde victor duchovni schrieb default postfix explicitly uses dns explained previous response solution sites nsswitch files dns want postfix use smtp_host_lookup native hidden question though whether anything wrong docs 250 postconf5 disable_dns_lookups default disable dns lookups postfix smtp lmtp clients disabled hosts looked getaddrinfo system library routine normally also looks etchosts dns lookups enabled default smtp_host_lookup default dns mechanisms postfix smtp client uses look hosts ip address parameter ignored dns lookups disabled apart fact english syntax description smtp_host_lookup slightly garbled since least 213 proper interpretation two along martin martin schmitt schmitt systemberatung httpwwwscsyde de 35415 pohlheim gießener str 18 de 65307 bad schwalbach bräunchesberg 9 linuxunix internet email infrastructure antispamantivirus goes must come ask system administrator wed 06 aug 2008 050253 0100 force postfix look hosts file first