Hi, On Friday 22 February 2008, FM wrote: > some customer have problem sending email to us. > > When they tested using telnet : > [EMAIL PROTECTED] bfreebody]$ telnet mail.LEXUM.UMontreal.CA. 25 > Trying 132.204.136.52... > Connected to mail.LEXUM.UMontreal.CA.. > Escape character is '^]'.mail.LEXUM.UMontreal.CA > 220 gw-mail.lexum.umontreal.ca ESMTP > helo mail139.messagelabs.com > 250 gw-mail.lexum.umontreal.ca Ok. > mail from:<[EMAIL PROTECTED]> > 417 DNS lookup failure: bell.ca. Try again later. > ^] > telnet> quit > > > What is courier-mta doing when user had the mail from ? I supposed it is > a dns lookup but of which fqdn ?
Hmm, afaik a MX-record must be a hostname, not an alias (CNAME).. $ host -t mx lexum.umontreal.ca lexum.umontreal.ca mail is handled by 10 mail.lexum.umontreal.ca. lexum.umontreal.ca mail is handled by 20 smtps1.umontreal.ca. lexum.umontreal.ca mail is handled by 20 smtps2.umontreal.ca. $ host mail.lexum.umontreal.ca mail.lexum.umontreal.ca is an alias for gw-mail.LEXUM.UMontreal.CA. gw-mail.LEXUM.UMontreal.CA has address 132.204.136.52 Change mail.lexum.umontreal.ca to an A-Record in your DNS and you're good to go. Sorry, don't remember the RFC for this, but I'm pretty sure that this is your problem. -- Regards, Arno. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ courier-users mailing list [email protected] Unsubscribe: https://lists.sourceforge.net/lists/listinfo/courier-users
