Hi all, I had a big problem I did not figured out. It is solved, but I have questions about the matter. It's about Exim 4.72/CentOS 6. Connecting to Exim via "localhost" is denies relay Connecting to Exim via 127.0.0.1 accepts the relay "localhost" is in the local_domains domainlists "localhost" is resolving to 127.0.0.1 in /etc/hosts Why? [mihamina at recette53 ~]$ rpm -aq | grep exim exim-4.72-4.el6.x86_64 [mihamina at 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 at free.fr> 250 OK RCPT to: <mihamina at rktmb.org> 550 relay not permitted mihamina at 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 at free.fr> 250 OK RCPT to: <mihamina at rktmb.org> 250 Accepted DATA 354 Enter message, ending with "." on a line by itself From: <mrakotom at free.fr> To: <mihamina at rktmb.org> Subject: Haftra Andrana Ity dia andrana fotsiny ihany. . 250 OK id=1UEykk-0006Fr-TO QUIT 221 recette53.ideoneov.com closing connection -- RMA. -- RMA.
Hi Mihamina,> [mihamina at recette53 ~]$ rpm -aq | grep exim > exim-4.72-4.el6.x86_64 > > [mihamina at 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 at free.fr> > 250 OK > RCPT to: <mihamina at rktmb.org> > 550 relay not permitted > > > mihamina at 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 at free.fr> > 250 OK > RCPT to: <mihamina at rktmb.org> > 250 Accepted > DATA > 354 Enter message, ending with "." on a line by itself > From: <mrakotom at free.fr> > To: <mihamina at rktmb.org> > Subject: Haftra AndranaI'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.