Hi Mihamina,
[mihamina@recette53 ~]$ rpm -aq | grep exim exim-4.72-4.el6.x86_64
[mihamina@recette53 ~]$ telnet localhost 25 Trying ::1... Connected to localhost. Escape character is '^]'. 220 recette53.ideoneov.com ESMTP Exim 4.72 Mon, 11 Mar 2013 10:09:27 +0100 HELO mihamina 250 recette53.ideoneov.com Hello localhost [::1] MAIL from: mrakotom@free.fr 250 OK RCPT to: mihamina@rktmb.org 550 relay not permitted
mihamina@recette53 ~]$ telnet 127.0.0.1 25 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. 220 recette53.ideoneov.com ESMTP Exim 4.72 Mon, 11 Mar 2013 10:10:26 +0100 HELO mihamina 250 recette53.ideoneov.com Hello localhost [127.0.0.1] MAIL from: mrakotom@free.fr 250 OK RCPT to: mihamina@rktmb.org 250 Accepted DATA 354 Enter message, ending with "." on a line by itself From: mrakotom@free.fr To: mihamina@rktmb.org Subject: Haftra Andrana
I'm not a specialist on EXIM, but obviously your system resolves 'localhost' to the IPv6 address ::1.
Probably you have allowed EXIM to relay for 127.0.0.1/8, but not for ::1, so it will allow relay access on IPv4 localhost, but not on IPv6 localhost.
Cheers,
Peter.