On Tue, 2007-03-13 at 12:48 +0000, Jonathan Allen wrote: > Jim van Wel wrote: > > > > You should get an error back. So what's the error? > > No error, it never leaves the queue. It just sits there complaining > about a read error. Standard "warning 4 hours" and then "error 5 days" > messages from sendmail on our mailhost. > > If I switch over for ten minutes to our ISP's smarthost then it's > gone in just a few seconds and charter.net accept delivery from them. > > If I try to connect to their SMTP port by hand: > > mirror!~ % telnet charter.net 25 > Trying 64.192.190.12... > telnet: connect to address 64.192.190.12: Connection refused > telnet: Unable to connect to remote host: Connection refused > > So I think it's an IP address based thing at their end. > That address doesn't have an SMTP server listening. For mail delivery, the DNS MX (Mail eXchanger) record is used. a "dig mx charter.net" gives me the following: [mfleming@defender mail]$ dig mx charter.net ; <<>> DiG 9.3.4 <<>> mx charter.net ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52277 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3 ;; QUESTION SECTION: ;charter.net. IN MX ;; ANSWER SECTION: charter.net. 75909 IN MX 10 mail.charter.net. ;; AUTHORITY SECTION: charter.net. 162311 IN NS auth0.ns.charter.net. charter.net. 162311 IN NS auth1.ns.charter.net. ;; ADDITIONAL SECTION: mail.charter.net. 75909 IN A 209.225.8.224 auth0.ns.charter.net. 162309 IN A 209.225.8.42 auth1.ns.charter.net. 162309 IN A 24.240.141.241 ;; Query time: 24 msec ;; SERVER: 10.0.4.35#53(10.0.4.35) ;; WHEN: Tue Mar 13 22:57:23 2007 ;; MSG SIZE rcvd: 141 ....connecting to port 25 (smtp) on the "mail.charter.net" address gives me the following: [mfleming@defender mail]$ telnet mail.charter.net 25 Trying 209.225.8.224... Connected to mail.charter.net (209.225.8.224). Escape character is '^]'. 220 charter.net ESMTP server ready Tue, 13 Mar 2007 09:00:41 -0400 Your mileage may vary, but the 209.225.8.224 IP is the one you really want to talk to. > Jonathan Michael. -- Michael Fleming <mfleming@xxxxxxxxxxxxxxxx> in Brisbane, Australia "Be master of your mind, not mastered by mind"
