Discovered on production servers, then proven in the lab. -----Original Message----- From: Tim Ault [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 10:47 AM To: Exchange Discussions Subject: RE: No MX Record ?
how'd you discover this? find it in the lab? a cursory check of the usual resources against the likely keywords reveals no mention of this item. -----Original Message----- From: Baker, Jennifer [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 1:37 PM To: Exchange Discussions Subject: RE: No MX Record ? Yes, which is the only reason we upgraded our relay servers recently. -----Original Message----- From: Andy David [mailto:[EMAIL PROTECTED]] Sent: Wednesday, August 28, 2002 9:41 AM To: Exchange Discussions Subject: RE: No MX Record ? Interesting. I have never heard that before. 5.5 requires an mx record? -----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. 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