Why is e-mail being rejected when sending to an external domain? AD 5/29/2007 8:12:02 PM I have a user that is trying to send e-mail to another user in a different domain; however, the message gets a bounce back. every time We are able to send e-mail to most external domains except two or three (as of now). I'm assuming this is some sort of DNS issue but I'm not sure where to start looking. Can anyone assist me with this? I would be so grateful. Below is a copy of the NDR that gets delivered back to us. -------------------- The following recipient(s) could not be reached: user[ at ]externaldomain.net on 5/29/2007 11:58 AM You do not have permission to send to this recipient. For assistance, contact your system administrator. <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail from IP xx.xxx.xxx.xxx was rejected. We can't currently accept your message. : user[ at ]externaldomain.com>

Re: Why is e-mail being rejected when sending to an external domain? "Ace Fekay [MVP]" <PleaseAskMe[ at ]SomeDomain.com> 5/29/2007 10:31:48 PM In news:AE2B62F4-17AA-4BAA-AC6F-39BD8AE99CAE[ at ]microsoft.com, AD <AD[ at ]discussions.microsoft.com> typed: [Quoted Text] > I have a user that is trying to send e-mail to another user in a > different domain; however, the message gets a bounce back. every time > We are able to send e-mail to most external domains except two or > three (as of now). I'm assuming this is some sort of DNS issue but > I'm not sure where to start looking. Can anyone assist me with this? > I would be so grateful. > > Below is a copy of the NDR that gets delivered back to us. > -------------------- > > The following recipient(s) could not be reached: > > user[ at ]externaldomain.net on 5/29/2007 11:58 AM > You do not have permission to send to this recipient. For > assistance, contact your system administrator. > <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail > from IP xx.xxx.xxx.xxx was rejected. We can't currently accept your > message. : user[ at ]externaldomain.com> The error "5.7.1 smtp;550 5.7.1" is an 'unagble to relay error. Are they using Exchange? What type of client? Outlook? Or is this a POP or IMAP account, or using OUtlook Express, or a handheld ( Windows Mobile, Palm Treo, Blackberry, etc), using SMTP to send data? If so, does it allow relaying? Also, the externaldomain.com can be larger than 512 bytes in a DNS response and if so, and the DNS server is Windows 2003, and your router/firewall is not allowing that type of trafffic, that can generate that as well, but it is usually an error where the client is trying to send it out directly using SMTP and is trying to relay. Ace -- Regards, Ace This posting is provided "AS-IS" with no warranties or guarantees and confers no rights. Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP Microsoft MVP - Directory Services Microsoft Certified Trainer Infinite Diversities in Infinite Combinations Having difficulty reading or finding responses to your post? Instead of the website you're using, try using OEx (Outlook Express or any other newsreader), and configure a news account, pointing to news.microsoft.com. Anonymous access. It's free - no username or password required nor do you need a Newsgroup Usenet account with your ISP. It connects directly to the Microsoft Public Newsgroups. OEx allows you o easily find, track threads, cross-post, sort by date, poster's name, watched threads or subject. It's easy: How to Configure OEx for Internet News http://support.microsoft.com/?id=171164 "Quitting smoking is easy. I've done it a thousand times." - Mark Twain

Re: Why is e-mail being rejected when sending to an external domain? James Beukelman <james978[ at ]gmail.com> 5/30/2007 3:26:37 AM AD wrote: [Quoted Text] > I have a user that is trying to send e-mail to another user in a different > domain; however, the message gets a bounce back. every time We are able to > send e-mail to most external domains except two or three (as of now). I'm > assuming this is some sort of DNS issue but I'm not sure where to start > looking. Can anyone assist me with this? I would be so grateful. > > Below is a copy of the NDR that gets delivered back to us. > -------------------- > > The following recipient(s) could not be reached: > > user[ at ]externaldomain.net on 5/29/2007 11:58 AM > You do not have permission to send to this recipient. For > assistance, contact your system administrator. > <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail from > IP xx.xxx.xxx.xxx was rejected. We can't currently accept your message. : > user[ at ]externaldomain.com> Does your mail server's public IP have a reverse lookup? Many domains/ISP's (Comcast that I can remember right now) are requiring valid reverse lookups, else they get rejected.

Re: Why is e-mail being rejected when sending to an external domain? "Greg Lindsay [MSFT]" <greglin[ at ]microsoft.com> 5/30/2007 10:08:01 PM See the following knowledgebase article pertaining to this error message: http://support.microsoft.com/kb/923495 I hope this helps! -- Greg Lindsay [MSFT] Disclaimer: This posting is provided "AS IS" with no warranties, and confers no rights. "AD" <AD[ at ]discussions.microsoft.com> wrote in message news:AE2B62F4-17AA-4BAA-AC6F-39BD8AE99CAE[ at ]microsoft.com... [Quoted Text] >I have a user that is trying to send e-mail to another user in a different > domain; however, the message gets a bounce back. every time We are able > to > send e-mail to most external domains except two or three (as of now). I'm > assuming this is some sort of DNS issue but I'm not sure where to start > looking. Can anyone assist me with this? I would be so grateful. > > Below is a copy of the NDR that gets delivered back to us. > -------------------- > > The following recipient(s) could not be reached: > > user[ at ]externaldomain.net on 5/29/2007 11:58 AM > You do not have permission to send to this recipient. For > assistance, contact your system administrator. > <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail from > IP xx.xxx.xxx.xxx was rejected. We can't currently accept your message. : > user[ at ]externaldomain.com>

Re: Why is e-mail being rejected when sending to an external domai AD 5/31/2007 6:32:00 AM Our user is using Exchange and the client is Outlook 2003. We recently switched our Exchange server to a colo so the IP for our mail server has changed. It's not a POP or IMAP account. It's an SMTP account. No it does not allow relaying. It's closed off to open relaying. The user at our company used to be able to send to the user at the external domain; however, since we moved changed the public IP to our mail server the user at our company has been unable to send messages to the external user. I'm assuming this is some sort of DNS issue somewhere, but I can't figure out what it would be or where to start looking. "it is usually an error where the client is trying to send it out directly using SMTP and is trying to relay." How would I be able to find out if this is the problem? I'm not a DNS expert and I'm very new to it so I'm not sure where I would start looking. Would it be under properties of the SMTP virtual server? "Ace Fekay [MVP]" wrote: [Quoted Text] > In news:AE2B62F4-17AA-4BAA-AC6F-39BD8AE99CAE[ at ]microsoft.com, > AD <AD[ at ]discussions.microsoft.com> typed: > > I have a user that is trying to send e-mail to another user in a > > different domain; however, the message gets a bounce back. every time > > We are able to send e-mail to most external domains except two or > > three (as of now). I'm assuming this is some sort of DNS issue but > > I'm not sure where to start looking. Can anyone assist me with this? > > I would be so grateful. > > > > Below is a copy of the NDR that gets delivered back to us. > > -------------------- > > > > The following recipient(s) could not be reached: > > > > user[ at ]externaldomain.net on 5/29/2007 11:58 AM > > You do not have permission to send to this recipient. For > > assistance, contact your system administrator. > > <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail > > from IP xx.xxx.xxx.xxx was rejected. We can't currently accept your > > message. : user[ at ]externaldomain.com> > > The error "5.7.1 smtp;550 5.7.1" is an 'unagble to relay error. > > Are they using Exchange? What type of client? Outlook? Or is this a POP or > IMAP account, or using OUtlook Express, or a handheld ( Windows Mobile, Palm > Treo, Blackberry, etc), using SMTP to send data? If so, does it allow > relaying? Also, the externaldomain.com can be larger than 512 bytes in a DNS > response and if so, and the DNS server is Windows 2003, and your > router/firewall is not allowing that type of trafffic, that can generate > that as well, but it is usually an error where the client is trying to send > it out directly using SMTP and is trying to relay. > > Ace > > -- > Regards, > Ace > > This posting is provided "AS-IS" with no warranties or guarantees and > confers no rights. > > Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP > Microsoft MVP - Directory Services > Microsoft Certified Trainer > > Infinite Diversities in Infinite Combinations > > Having difficulty reading or finding responses to your post? > Instead of the website you're using, try using OEx (Outlook Express > or any other newsreader), and configure a news account, pointing to > news.microsoft.com. Anonymous access. It's free - no username or password > required nor do you need a Newsgroup Usenet account with your ISP. It > connects directly to the Microsoft Public Newsgroups. OEx allows you > o easily find, track threads, cross-post, sort by date, poster's name, > watched threads or subject. It's easy: > > How to Configure OEx for Internet News > http://support.microsoft.com/?id=171164 > > "Quitting smoking is easy. I've done it a thousand times." - Mark Twain > > > > > >

Re: Why is e-mail being rejected when sending to an external domai AD 5/31/2007 6:35:00 AM Does your mail server's public IP have a reverse lookup? Yup. I ping it by IP and it resolves correctly to mail.ourdomain.com so that seems to be fine. "James Beukelman" wrote: [Quoted Text] > AD wrote: > > I have a user that is trying to send e-mail to another user in a different > > domain; however, the message gets a bounce back. every time We are able to > > send e-mail to most external domains except two or three (as of now). I'm > > assuming this is some sort of DNS issue but I'm not sure where to start > > looking. Can anyone assist me with this? I would be so grateful. > > > > Below is a copy of the NDR that gets delivered back to us. > > -------------------- > > > > The following recipient(s) could not be reached: > > > > user[ at ]externaldomain.net on 5/29/2007 11:58 AM > > You do not have permission to send to this recipient. For > > assistance, contact your system administrator. > > <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail from > > IP xx.xxx.xxx.xxx was rejected. We can't currently accept your message. : > > user[ at ]externaldomain.com> > > Does your mail server's public IP have a reverse lookup? Many > domains/ISP's (Comcast that I can remember right now) are requiring > valid reverse lookups, else they get rejected. >

Re: Why is e-mail being rejected when sending to an external domai AD 5/31/2007 6:36:01 AM This looks interesting and is worth a shot. I will try the solution tomorrow and post feedback. Thanks for the help! "Greg Lindsay [MSFT]" wrote: [Quoted Text] > See the following knowledgebase article pertaining to this error message: > > http://support.microsoft.com/kb/923495 > > I hope this helps! > -- > Greg Lindsay [MSFT] > > Disclaimer: This posting is provided "AS IS" with no warranties, and confers > no rights. > > "AD" <AD[ at ]discussions.microsoft.com> wrote in message > news:AE2B62F4-17AA-4BAA-AC6F-39BD8AE99CAE[ at ]microsoft.com... > >I have a user that is trying to send e-mail to another user in a different > > domain; however, the message gets a bounce back. every time We are able > > to > > send e-mail to most external domains except two or three (as of now). I'm > > assuming this is some sort of DNS issue but I'm not sure where to start > > looking. Can anyone assist me with this? I would be so grateful. > > > > Below is a copy of the NDR that gets delivered back to us. > > -------------------- > > > > The following recipient(s) could not be reached: > > > > user[ at ]externaldomain.net on 5/29/2007 11:58 AM > > You do not have permission to send to this recipient. For > > assistance, contact your system administrator. > > <ourmailserver.ourdomain #5.7.1 smtp;550 5.7.1 Your mail from > > IP xx.xxx.xxx.xxx was rejected. We can't currently accept your message. : > > user[ at ]externaldomain.com> > > >

Re: Why is e-mail being rejected when sending to an external domai "Ace Fekay [MVP]" <PleaseAskMe[ at ]SomeDomain.com> 6/1/2007 10:57:51 AM In news:86903E3A-871B-432A-AB19-5B0BE3B9E1F1[ at ]microsoft.com, AD <AD[ at ]discussions.microsoft.com> typed: [Quoted Text] > Our user is using Exchange and the client is Outlook 2003. We > recently switched our Exchange server to a colo so the IP for our > mail server has changed. It's not a POP or IMAP account. It's an > SMTP account. No it does not allow relaying. It's closed off to > open relaying. The user at our company used to be able to send to > the user at the external domain; however, since we moved changed the > public IP to our mail server the user at our company has been unable > to send messages to the external user. I'm assuming this is some > sort of DNS issue somewhere, but I can't figure out what it would be > or where to start looking. > > "it is usually an error where the client is trying to send it out > directly using SMTP and is trying to relay." > > How would I be able to find out if this is the problem? I'm not a DNS > expert and I'm very new to it so I'm not sure where I would start > looking. Would it be under properties of the SMTP virtual server? If Outlook is configured as an SMTP account, then you've actually configured Outlook for either POP or IMAP. If the users have all their folders, then it's IMAP, otherwise if just the inbox, it's POP. POP3 and IMAP4 are 'retrieval' protocols. SMTP is a sending protocol. Both types actually use SMTP to send mail. Therefore to me it is a RELAY problem. Set the users in the POP or IMAP properties to authenticate when sending mail. By default Exchange will allow to relay mail if authenticated. Ace