Idézem/Quoting Sam Varshavchik <mr...@courier-mta.com>: > SZÉPE Viktor writes: > > >> 2) Is it possible for Courier to skip DNS lookups for "localhost"? >> >> I wonder why Courier is not using gethostbyname(). >> /etc/hosts contains: >> 127.0.0.1 localhost.localdomain localhost > > gethostbyname/gethostbyaddr can only look up A addresses. Courier > needs MX records, and so needs to use its own resolver; and with its > own DNS resolver code already in place, it makes no sense to use > different resolvers. > > There are several options in the esmtpd config file that control DNS > lookups on incoming connections: > > BOFHCHECKDNS; and TCPDOPTS passes through the options to > couriertcpd, such as -nodnslookup.
Thank you for your support! -nodnslookup is the solution for satellite type server which delivery messages through one smarthost. What should I do on normal (tcp/25,587,465 are open to the internet) mail server where DNS lookup is necessary? Is there a way to exclude localhost from DNS lookup on the initial (pre-EHLO) connection? SZÉPE Viktor https://github.com/szepeviktor/debian-server-tools/blob/master/CV.md -- +36-20-4242498 s...@szepe.net skype: szepe.viktor Budapest, III. kerület ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ courier-users mailing list courier-users@lists.sourceforge.net Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
