Thanks Jennifer. I too was wondering what the RFC would have to do with this. So basically I have to inform the organization to put in an MX record in their DNS or no Exchange 5.5. server will be able to send them email ?
-----Original Message----- From: Baker, Jennifer [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 12:35 PM To: Exchange Discussions Subject: RE: No MX Record ? 5.5 requires an mx record to send mail. This is not RFC behavior IMO. E2k does not require it and uses the "a" record if an "mx" record is not present. -----Original Message----- From: RBHATIA [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 9:24 AM To: Exchange Discussions Subject: RE: No MX Record ? I did look up the RFC...and am soliciting a response from this list since it wasn't much help in resolving my problem. Here is an excerpt from the RFC that doesn't apply to my Exchange server : The lookup first attempts to locate an MX record associated with the name. If a CNAME record is found instead, the resulting name is processed as if it were the initial name. If no MX records are found, but an A RR is found, the A RR is treated as if it was associated with an implicit MX RR, with a preference of 0, pointing to that host. In this case there is an A record associated with HOUSTONFEARLESS.COM - 65.204.137.153 So why do the emails still sit in the queue ? -----Original Message----- From: Andy David [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 12:19 PM To: Exchange Discussions Subject: RE: No MX Record ? RFC2821 -----Original Message----- From: RBHATIA [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 12:09 PM To: Exchange Discussions Subject: RE: No MX Record ? How does Exchange 5.5 handle mail in the absence of an MX record ? -----Original Message----- From: Andy David [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 12:13 PM To: Exchange Discussions Subject: RE: No MX Record ? One does not absolutely need a MX record to receive mail. -----Original Message----- From: RBHATIA [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 12:03 PM To: Exchange Discussions Subject: No MX Record ? Hi, I've been having problems sending email to users in a domain called houstonfearless.com The IMC queue states "Network error during host resolution". I did some troubleshooting and it seems like the domain does not have an MX record. I'm running Exchange 5.5. SP4 that is using DNS to send email externally. What's wierd though is that they are receiving email from other people. I even sent them a test message from my YAHOO account and they received it. Any ideas ?? _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] ---------------------------------------------------------------------------- -- The information contained in this email message is privileged and confidential information intended only for the use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copy of this message is strictly prohibited. If you have received this email in error, please immediately notify Veronis Suhler Stevenson by telephone (212)935-4990, fax (212)381-8168, or email ([EMAIL PROTECTED]) and delete the message. 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