I believe hotmail does reverse-dns lookups. Don't know about mediaone[1]. The UNIX guys don't have to modify their boxes, they simply need to put a valid From: address[2], that's all.
Serdar Soysal [1] Since MediaOne was bought out by ComCast, it is really a very bad test platform. ANYTHING can go wrong with ComCast. Their systems are in complete disarray and their tech support folks are completely clueless at best. It's like trying to have drunk squirrels troubleshoot a nuclear reactor leak. [2] If your company's internet presence (MX record) is crowley.com, they should be sending messages to the Internet from and address like <username>@crowley.com, not [EMAIL PROTECTED] You can give them a public folder with a certain valid username and tell them to use that email address in the From: field when they're sending. -----Original Message----- From: Billups, Mort [mailto:[EMAIL PROTECTED]] Sent: Friday, March 01, 2002 12:41 PM To: Exchange Discussions Subject: RE: SMTP Question The tests are to personal Internet email accounts (hotmail, mediaone). I also believe the failure of the lookups is the problem. The Unix guys aren't to excited about modifying their boxes, so I wanted to be sure it didn't have anything to do with the IMC or on our internal DNS. I am still researching. Thanks for your response. Mort Billups Crowley Maritime Corporation -----Original Message----- From: Tom Meunier [mailto:[EMAIL PROTECTED]] Sent: Friday, March 01, 2002 12:07 PM To: Exchange Discussions Subject: RE: SMTP Question Tests to where? I'm thinking that if your IMC is configured to allow this machine by IP address, that error isn't being generated by your Exchange box, but by the remote host, which is trying to do a lookup on your Unix box and failing. > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Posted At: Friday, March 01, 2002 10:23 AM > Posted To: MSExchange Mailing List > Conversation: SMTP Question > Subject: SMTP Question > > > Hi, > Our Unix folks are trying to send mail via our Exchange IMC > box. Their machine is allow to relay in the IMC routing > configuration. In tests the mail fails delivery with an error > message "553 5.1.8 Domain of sender address does not exist. > The From address of the email has the FQDN of the server. I > believe it fails because any reverse lookups will be unable > to resolve the domain name in the From address. Do I > understand this correctly? Just trying to do my homework. > > Mort Billups > Crowley Maritime Corporation _________________________________________________________________ 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] _________________________________________________________________ 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] _________________________________________________________________ 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]
