david l goodrich wrote:
this isn't real promising:
You need to learn the difference between DNS A- and MX-records (and SMTP syntax :-).
dlg@scotty:~$ telnet lists.roundcube.net 25 Trying 195.159.29.201... Connected to lists.roundcube.net. Escape character is '^]'. 220 mail.maildialog.com ESMTP helo a 250 mail.maildialog.com mail from: dlg@foo.org 250 ok rcpt to: dev@lists.roundcube.net 553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)
bob@che:~$ dig -t mx lists.roundcube.net
<clip> ;; ANSWER SECTION: lists.roundcube.net. 86400 IN MX 10 maildialog.com. <clip> bob@che:~$ telnet maildialog.com 25 Trying 195.159.29.202... Connected to maildialog.com. Escape character is '^]'. 220 maildialog.com ESMTP helo a 250 maildialog.com Hello ti122110a081-10547.bb.online.no [85.166.105.51] mail from:<dlg@foo.org> 250 OK rcpt to:<dev@lists.roundcube.net> 250 Accepted quit 221 maildialog.com closing connection Connection closed by foreign host. bob@che:~$