On Mon, Aug 09, 2010 at 04:29:21PM CEST, Nicolas Michel <nicolas.mic...@lemail.be> said: > Hello, > > I want to know if there is a way to reject connections from host not > listed in the MX records of the domain it claims to be. > > For example : a host with IP WWW.XXX.YYY.ZZZ try so send a mail to my > domain (we'll call it mydomain.be) and claims that the sender is > u...@otherdomain.com > > If WWW.XXX.YYY.ZZZ is not a MX server of otherdomain.com my mail > server will reject the connection. > > If it is possible, will it cause some troubles? Will I loose some > legitimate mails? Because of misconfiguration or an other reason?
yes you will loosez them. Big ISPs, and many other domains do not use same servers for outgoing and incoming mails. -- Erwan
