On 9/16/2004 11:21 AM, Stan Horwitz wrote: > When I log onto our listserv host and try to telnet to netscape.com 25 > I get the following > > # telnet netscape.com 25 > Trying 64.12.37.146... > telnet: connect to address 64.12.37.146: Connection timed out > telnet: Unable to connect to remote host: Connection timed out > > which suggests to me that there's a problem with netscape receiving email, > but I can send individual emails to the same address from my email account > just fine. To the best of my knowledge, we are not encountering problems sending messages to addresses in the netscape.com domain. Having said that, I should point out that your trouble-shooting technique is flawed. Many sites create domain-level DNS A records which resolve to their web servers, so that web surfers who type the domain name in the browser location box will be directed to the domain's web site. That seems to be what Netscape has done. Consequently, your SMTP connection attempt was directed to a web server, not a mail server. I am not surprised that the SMTP connection request timed out. When you send an email message, your mail server performs a DNS query to identify the MX (Mail eXchanger) host for the domain portion of the recipient address. When you are testing email delivery to a host or domain, you also need to direct your SMTP connection request to the appropriate MX host. You can use 'nslookup -q=MX' to identify the domain's MX host. As you can see below, netscape.com and www.netscape.com resolve to the same IP address, but the MX host for the netscape.com domain has a different IP address. ----- begin ----- * get the IP address for 'netscape.com' sunbear(prussell):~ > nslookup netscape.com Server: bind.nd.edu Address: 129.74.250.100 Non-authoritative answer: Name: netscape.com Addresses: 64.12.37.146, 64.12.180.19 * get the IP address for the likely netscape.com web server sunbear(prussell):~ > nslookup www.netscape.com Server: bind.nd.edu Address: 129.74.250.100 Non-authoritative answer: Name: www.gwww.netscape.com Address: 64.12.37.146 Aliases: www.netscape.com * get the MX hostname for the netscape.com domain sunbear(prussell):~ > nslookup -q=MX netscape.com Server: bind.nd.edu Address: 129.74.250.100 Non-authoritative answer: netscape.com preference = 10, mail exchanger = mail.netscape.everyone.net Authoritative answers can be found from: netscape.com nameserver = ns2.netscape.com netscape.com nameserver = ns.netscape.com netscape.com nameserver = ns1.netscape.com * get the IP address of the MX host for the netscape.com domain sunbear(prussell):~ > nslookup mail.netscape.everyone.net Server: bind.nd.edu Address: 129.74.250.100 Non-authoritative answer: Name: mail.netscape.everyone.net Address: 216.200.145.10 ----- end ----- -- Paul Russell Senior Systems Administrator OIT Messaging Services Team University of Notre Dame