RE: Reverse DNS on mail servers
Since your Received headers show: Received: by ow-mail.owenwilliams.co.uk with Internet Mail Service (5.5.2655.55) I'm guessing that you've got Exchange 5.5 running on a Windows 2000 server, and if you look under My Computer / Properties / Network Identification tab / Properties button, you'll see that your server name is ow-mail. Thus, your FQDN becomes ow-mail.owenwilliams, which is different from your MX records. Neil -Original Message- From: Neil Hobson Posted At: 25 April 2002 11:27 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: RE: Reverse DNS on mail servers I don't believe the NetBIOS name is relevant here, but I'm sure someone will correct me if I'm wrong. Neil -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Posted At: 25 April 2002 11:21 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: RE: Reverse DNS on mail servers AHA..so if the NETBIOS name on our internal network does not match the FQDN in DNS would I get a similar fault?? i.e. would the MTA be sending as if from the netbios name with the DNS suffix attached (ow-mail.owenwilliams.co.uk) The NETBIOS name is OW-MAIL and the FQDN in our DNS entry is MAIL.OWENWILLIAMS.CO.UK ... or am I barking up the wrong tree, or just barking for that matter? Cheers -Original Message- From: Neil Hobson [mailto:[EMAIL PROTECTED]] Sent: 25 April 2002 10:57 To: Exchange Discussions Subject: RE: Reverse DNS on mail servers Your ISP should do this for you. My understanding is that when your SMTP host (which is set to mail.owenwilliams.co.uk) communicates with the outside world, some hosts will try a reverse DNS lookup to prove that you are who you say you are. Your ISP needs to set your reverse DNS up so that anyone querying your IP address of 193.133.143.82 gets an answer of mail.owenwilliams.co.uk (I think). Neil -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Posted At: 25 April 2002 10:42 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: Reverse DNS on mail servers > Hi all > Hopefully just a quick one here...I have an issue with one of our > cutomers who will not accept email from us because our mail server > (apparently) is not reachable via a reverse DNS lookup. How and where > do I configure this? I thought it was done by the ISP hosting our > domain name on their DNS serversor do I need to specifically > configure it on the mail server itself? Many thanks > Dom. > > > _ 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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands, or any of its subsidiary companies. If you have received this email in error, please contact our Support Desk immediately by telephone on 01202-36 or via email at [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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands, or any of its subsidiary companies. If you have received this email in error, please contact our Support Desk immediately by telephone on 01202-36 or via email at [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] **
RE: Reverse DNS on mail servers
I don't believe the NetBIOS name is relevant here, but I'm sure someone will correct me if I'm wrong. Neil -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Posted At: 25 April 2002 11:21 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: RE: Reverse DNS on mail servers AHA..so if the NETBIOS name on our internal network does not match the FQDN in DNS would I get a similar fault?? i.e. would the MTA be sending as if from the netbios name with the DNS suffix attached (ow-mail.owenwilliams.co.uk) The NETBIOS name is OW-MAIL and the FQDN in our DNS entry is MAIL.OWENWILLIAMS.CO.UK ... or am I barking up the wrong tree, or just barking for that matter? Cheers -Original Message- From: Neil Hobson [mailto:[EMAIL PROTECTED]] Sent: 25 April 2002 10:57 To: Exchange Discussions Subject: RE: Reverse DNS on mail servers Your ISP should do this for you. My understanding is that when your SMTP host (which is set to mail.owenwilliams.co.uk) communicates with the outside world, some hosts will try a reverse DNS lookup to prove that you are who you say you are. Your ISP needs to set your reverse DNS up so that anyone querying your IP address of 193.133.143.82 gets an answer of mail.owenwilliams.co.uk (I think). Neil -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Posted At: 25 April 2002 10:42 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: Reverse DNS on mail servers > Hi all > Hopefully just a quick one here...I have an issue with one of our > cutomers who will not accept email from us because our mail server > (apparently) is not reachable via a reverse DNS lookup. How and where > do I configure this? I thought it was done by the ISP hosting our > domain name on their DNS serversor do I need to specifically > configure it on the mail server itself? Many thanks > Dom. > > > _ 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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands, or any of its subsidiary companies. If you have received this email in error, please contact our Support Desk immediately by telephone on 01202-36 or via email at [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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands, or any of its subsidiary companies. If you have received this email in error, please contact our Support Desk immediately by telephone on 01202-36 or via email at [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]
RE: Reverse DNS on mail servers
AHA..so if the NETBIOS name on our internal network does not match the FQDN in DNS would I get a similar fault?? i.e. would the MTA be sending as if from the netbios name with the DNS suffix attached (ow-mail.owenwilliams.co.uk) The NETBIOS name is OW-MAIL and the FQDN in our DNS entry is MAIL.OWENWILLIAMS.CO.UK ... or am I barking up the wrong tree, or just barking for that matter? Cheers -Original Message- From: Neil Hobson [mailto:[EMAIL PROTECTED]] Sent: 25 April 2002 10:57 To: Exchange Discussions Subject: RE: Reverse DNS on mail servers Your ISP should do this for you. My understanding is that when your SMTP host (which is set to mail.owenwilliams.co.uk) communicates with the outside world, some hosts will try a reverse DNS lookup to prove that you are who you say you are. Your ISP needs to set your reverse DNS up so that anyone querying your IP address of 193.133.143.82 gets an answer of mail.owenwilliams.co.uk (I think). Neil -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Posted At: 25 April 2002 10:42 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: Reverse DNS on mail servers > Hi all > Hopefully just a quick one here...I have an issue with one of our > cutomers who will not accept email from us because our mail server > (apparently) is not reachable via a reverse DNS lookup. How and where > do I configure this? I thought it was done by the ISP hosting our > domain name on their DNS serversor do I need to specifically > configure it on the mail server itself? Many thanks > Dom. > > > _ 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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands, or any of its subsidiary companies. If you have received this email in error, please contact our Support Desk immediately by telephone on 01202-36 or via email at [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]
RE: Reverse DNS on mail servers
Your ISP should do this for you. My understanding is that when your SMTP host (which is set to mail.owenwilliams.co.uk) communicates with the outside world, some hosts will try a reverse DNS lookup to prove that you are who you say you are. Your ISP needs to set your reverse DNS up so that anyone querying your IP address of 193.133.143.82 gets an answer of mail.owenwilliams.co.uk (I think). Neil -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Posted At: 25 April 2002 10:42 Posted To: Swynk Exchange List Conversation: Reverse DNS on mail servers Subject: Reverse DNS on mail servers > Hi all > Hopefully just a quick one here...I have an issue with one of our > cutomers who will not accept email from us because our mail server > (apparently) is not reachable via a reverse DNS lookup. How and where > do I configure this? I thought it was done by the ISP hosting our > domain name on their DNS serversor do I need to specifically > configure it on the mail server itself? Many thanks > Dom. > > > _ 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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual to whom it is addressed. Any view or opinions presented are solely those of the author and do not necessarily represent those of Silversands, or any of its subsidiary companies. If you have received this email in error, please contact our Support Desk immediately by telephone on 01202-36 or via email at [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]
RE: Reverse DNS on mail servers
Your send MTA may be routing mail from another IP address which doesn't match you MX records, so I believe. That is, your mx records for ownewilliams.co.uk is 193.133.143.82 with the highest preference. If you send mail via another IP address not in the MX records, then they will reject your mail. I think I'm right, so I'll wait for a second opinion!!! -Original Message- From: Olds, Dominic [mailto:[EMAIL PROTECTED]] Sent: 25 April 2002 10:42 To: Exchange Discussions Subject: Reverse DNS on mail servers > Hi all > Hopefully just a quick one here...I have an issue with one of our > cutomers who will not accept email from us because our mail server > (apparently) is not reachable via a reverse DNS lookup. How and where > do I configure this? I thought it was done by the ISP hosting our > domain name on their DNS serversor do I need to specifically > configure it on the mail server itself? Many thanks > Dom. > > > _ 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] ** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. Network Defence Ltd ** _ 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]
