Could it be your user is not a member of the other server to be sending mail through? Any possibility that the other server has your ip address/block banned?
~Rick > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Troy Hilton > Sent: Tuesday, November 25, 2003 12:08 PM > To: [EMAIL PROTECTED] > Subject: RE: [IMail Forum] OT: 550 Invalid domain: smells like bad DNS > > > Unfortunately Gerald, this is an Exchange server, not IMail. I needed to > pick some brains that are smarter than mine on this and I know > that there's > a vast wealth of knowledge on this list. > > My user can send and receive emails fine to many locations but there are a > number of clients that he gets "undeliverable" from with the "550 Invalid > domain" error. The boss is sweatin me on this but I can't see > anything wrong > with my servers. > > Troy > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] Behalf Of Gerald > > Sent: Tuesday, November 25, 2003 12:43 PM > > To: [EMAIL PROTECTED] > > Subject: Re: [IMail Forum] OT: 550 Invalid domain: smells like bad DNS > > > > > > On Tue, 25 Nov 2003 10:46:54 -0500 > > Troy Hilton was heard babbling something about [IMail Forum] > > OT: 550 Invalid domain: smells like bad DNS: > > > > > Hello All, > > > > > > Need some direction here. I've got a domain called > > sofmail.com that we > > > use > > > for our Small Business Server 2003. I've got a user who gets a "550 > > > Invalid > > > domain sofmail.com" error when sending to several external > > accounts. My > > > concern is that the DNS host (MCI) didn't setup the reverse DNS > > > correctly. > > > Being that I'm not a DNS guru I was hoping perhaps someone > > could shed > > > some > > > light on what's pointing where. I'm thinking that the > > recipient's mail > > > server is doing a reverse lookup for sofmail.com and can't > > find it. I > > > think > > > MCI created a PTR for mail.sofmail.com. What should it be? > > > > > > Any help is appreciated here. > > > > > > Troy > > > > The others verified that your DNS is {mostly} correct. I > > assume you have > > one of the "no-relay" options turned on in Imail. You said he > > gets error > > 550 when trying to send to EXTERNAL domains -- implying that mail to > > domains on your own host work OK. > > > > Are you sure he has his SMTP AUTHentication set up right? > > IMail may simply > > be refusing to relay for him because he isn't authenticating > > as a valid > > user who is OK to relay mail for. I realize the normal AUTH > > failure message > > is "550 -- Not a Gateway" but it's something to look at. > > > > -- > > Gerald V. Livingston II ___________________________________________________________________ Virus Scanned and Filtered by http://www.FamHost.com E-Mail System. To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
