tx for the tips, I will check that but I do not think that it is the prob. I ca do :
[rexford]$ telnet mail.lexum.umontreal.ca 25 Trying 132.204.136.52... Connected to gw-mail.lexum.umontreal.ca. Escape character is '^]'. 220 gw-mail.lexum.umontreal.ca ESMTP helo test.ca 250 gw-mail.lexum.umontreal.ca Ok. mail from:<[EMAIL PROTECTED]> 250 Ok. and we are receiving email from everywhere else. Arno wrote: > 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. > > ------------------------------------------------------------------------- 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
