Could be a firewall configuration that the recipient's IT dept won't allow relaying. ?
Tom ----- Original Message ----- From: "Troy Hilton" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Tuesday, November 25, 2003 1:17 PM Subject: RE: [IMail Forum] OT: 550 Invalid domain: smells like bad DNS | It is a possibility, of which I have no control over. If the recipient's IT | dept decide to block me then I'm outta luck. My first priority is to ensure | that there's nothing on my end that is wrong or that will cause emails to | fail delivery. | | Troy | | > -----Original Message----- | > From: [EMAIL PROTECTED] | > [mailto:[EMAIL PROTECTED] Behalf Of Rick Klinge | > Sent: Tuesday, November 25, 2003 1:47 PM | > To: [EMAIL PROTECTED] | > Subject: RE: [IMail Forum] OT: 550 Invalid domain: smells like bad DNS | > | > | > 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/ | > | | | 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/ | 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/
