On Wed, 2002-10-16 at 07:06, Michael Schwendt wrote: > On Wed, 16 Oct 2002 11:37:11 +0100, Tom Coady wrote: > > > From: "Tony Nugent" > > > Their mail server(s) will not accept email if the email address you > > > are sending from is unresolvable in the dns. > > > > And rightly so. However I believe my address is resolvable otherwise I > > would receive no incoming mail, > > That's something different, because in your case there are MX > records for dsl.pipex.com (which does not resolve and hence could > not handle incoming mail!) and when those mail exchange servers > (which do resolve) accept mail for your address, you receive mail. > > $ host -a dsl.pipex.com ns0-d.dns.pipex.net | grep MX > dsl.pipex.com. 600 IN MX 4 roadshow.systems.pipex.net. > dsl.pipex.com. 600 IN MX 4 funhouse.systems.pipex.net. > dsl.pipex.com. 600 IN MX 4 whirlwind.systems.pipex.net. > > (For the previous query I didn't get them, because they expire very > often). > > 250 mx1.redhat.com Hello x [x.x.x.x], pleased to meet you > MAIL FROM: test@dsl.pipex.com > 550 5.0.0 test@dsl.pipex.com... You msut use a valid mail server > MAIL FROM: test@blubb.dsl.pipex.com > 550 5.0.0 test@blubb.dsl.pipex.com... You msut use a valid mail server > (and now one that resolves) > MAIL FROM: test@pipex.net > 250 2.1.0 test@pipex.net... Sender ok > > > and the strange thing is that redhat > > accepted my mail for several weeks before they suddenly started > > rejecting stuff. > > Could it be that anything changed at your end? Did I do something wrong in getting this test to work? I swear I tried this 10 minutes ago and it did *not* work, as expected from everyone else's results. Did something A) get fixed while I was testing or B) am I on glue, or C) are there multiple hosts answering at 66.187.233.31 (just a thought)? I found the original test in scrollback, everything looks the same. Some editing of my information to keep it out of the search engines. [ryan@vanessa]:[~]$ telnet mx1.redhat.com smtp Trying 66.187.233.31... Connected to mx1.redhat.com. Escape character is '^]'. 220 **************************************************2******2002*20*2***0 *0*00 helo vanessa.endless.eu.org 250 mx1.redhat.com Hello foobar@my.real.reverse.domain [24.x.x.234] (may be forged), pleased to meet you MAIL FROM: test@dsl.pipex.com 550 5.0.0 test@dsl.pipex.com... You msut use a valid mail server MAIL FROM: ryan at endless dot eu.org 250 2.1.0 ryan at endless dot eu.org... Sender ok quit 221 2.0.0 mx1.redhat.com closing connection Connection closed by foreign host. 10 minutes passes .. host -a a bunch of domains .. [ryan@vanessa]:[~]$ telnet mx1.redhat.com smtp Trying 66.187.233.31... Connected to mx1.redhat.com. Escape character is '^]'. 220 **************************************************2******2002*20********0*00 helo vanessa.endless.eu.org 250 mx1.redhat.com Hello foobar@my.real.reverse.domain [24.x.x.234] (may be forged), pleased to meet you MAIL FROM: test@dsl.pipex.net 250 2.1.0 test@dsl.pipex.net... Sender ok quit 221 2.0.0 mx1.redhat.com closing connection Connection closed by foreign host. -- Powered by Red Hat Linux 8.0 -- Psyche-list mailing list Psyche-list@redhat.com https://listman.redhat.com/mailman/listinfo/psyche-list
