Lets focus on one aspect: When you see the "basic recipient name not recognized" error it should repeat the name it tried to send to in the NDR. Is that address correct? If it is correct then look at the server name and IP in the NDR message to make sure its your server generating the NDRs. If it is your server/IP generating the NDRs then the problem is not DNS.
If you verify its your server that made the NDRs and verified the "name not recognized" address is correct then its an exchange issue. I would be thinking towards some type of resource issue possibly causing a time out during the name lookup. If your server is NOT making the NDRs then its either DNS or an inbound connectivity issue. I'm also assuming your not running any AntiVirus/AntiSpam gateways or using Blacklisting since you didn't mention it, but if you are, the AntiSpam/Virus NDRs would be from your server. Jim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Tuesday, March 02, 2004 6:00 PM To: Exchange Discussions Subject: RE: Reports of undeliverables I have seen some unsupported body types and the basic recipent name no recognized. Is there something I am not seeing in that nslookup, it looks ok to me. e- thanks for the help btw. -----Original Message----- From: Jim McGowan [mailto:[EMAIL PROTECTED] Sent: Tuesday, March 02, 2004 3:40 PM To: Exchange Discussions Subject: [SPAM] - RE: Reports of undeliverables - Number of numbers in MIME From exceeds maximum threshold Maybe its not you. Maybe the DNS servers are not behaving. Non-authoritative answer: aruplab.com mail exchanger = 10 postoffice05.aruplab.com. aruplab.com nameserver = cmtu.mt.ns.els-gms.att.net. aruplab.com nameserver = cbru.br.ns.els-gms.att.net. Authoritative answers can be found from: aruplab.com nameserver = cbru.br.ns.els-gms.att.net. aruplab.com nameserver = cmtu.mt.ns.els-gms.att.net. postoffice05.aruplab.com internet address = 12.10.133.23 You may not notice a DNS failure from the inside. What error codes are you getting in the NDs Jim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hansen, Eric Sent: Tuesday, March 02, 2004 5:11 PM To: Exchange Discussions Subject: RE: Reports of undeliverables No fixup protocol running, this problem isnt happening all the time. I would say it encompases 10% to 20% of all the email into our system I am this ][ close to calling pss. -lost _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&; lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&; lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&; lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
