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Windows Server Forum / Windows NT / DNS / March 2004Problems sending email to AT&T customers
I have not been able to get emails through to several different AT&T customers for months. I get bouncebacks stating that the delivery failed "due to a communications failure" AT&T assures me they are not blocking us, the clients are not blocking us, and AT&T said it might be a problem with my email server. If it is a problem with my server, how do I find out? What kinds of problems could it be? What things can I try to do to fix it? Thanks, Susan >I have not been able to get emails through to several >different AT&T customers for months. I get bouncebacks [quoted text clipped - 4 lines] > >If it is a problem with my server, how do I find out? Look at the logs, look at the NDR files if any. >What kinds of problems could it be? Might be DNS, but it's tough to tell without *any* details. >What things can I try to do to fix it? Look at the SMTP logs and see what's happening. Try a NSllokup on AT&T's mail server and check that your SMTP can resolve the MMX record. Make sure you have a valid reverse DNS record for your mail server. make sure you're not on a blacklist. And next time you can't get email through "for months" start looking at the problem a little sooner. Jeff Be patient please. I am not a techie and I don't know how to do some of the things you thought I could try. I have been battling with this issue for so long, calling and emailing anyone who I thought might be able to help and no one seems to know anything about their JOBS! I have responded to several of your comments below. Thanks >-----Original Message----- > [quoted text clipped - 8 lines] > >Look at the logs, look at the NDR files if any. How do I do this? >>What kinds of problems could it be? > >Might be DNS, but it's tough to tell without *any* details. I don't have *any* details. there isn't even any header info in the bouncebacks. This started right after we changed ISP's and our ISP can't even explain. >>What things can I try to do to fix it? > >Look at the SMTP logs and see what's happening. Try a NSllokup on >AT&T's mail server and check that your SMTP can resolve the MMX >record. How do I do this? Make sure you have a valid reverse DNS record for your mail >server. I do not, but I don't know how to change that make sure you're not on a blacklist. I have checked. I am not being blacklisted. And next time you can't >get email through "for months" start looking at the problem a little >sooner. I have been working on this problem every week since September. AT&T would not respond to inquiries, my ISP kept blaming AT&T, and none of these so called "professionals" seem to have any idea what the problem is! I am not a techie. I am just trying to get the company's email working properly with no help from ANYONE If you could tell me how to do this things you suggested in your email, I would greatly appreciate it. This chat group was my last idea and I got a response back faster than I did from any of the other places I tried. Thanks! Susan >Be patient please. I am not a techie and I don't know how >to do some of the things you thought I could try. I have [quoted text clipped - 17 lines] > >How do I do this? Depending on how you may have set this up, the Windows SMTP logs are normally in \\winnt\system32\logfiles\smtp. One question I didn't ask is "Are you running your own SMTP server?" If not, the problem isn't under your control. >>>What kinds of problems could it be? >> >>Might be DNS, but it's tough to tell without *any* >details. I don't have *any* details. there isn't even >any header info in the bouncebacks. This started right >after we changed ISP's and our ISP can't even explain. Does your ISP hanlde your DNS? Are you behind a firewall or proxy server? Does your ISP handle your email? >>>What things can I try to do to fix it? >> [quoted text clipped - 5 lines] > >How do I do this? Look at the logs as I explained further up. Also, from your mail server, try to Ping the destination address from the messages that don't get through. >Make sure you have a valid reverse DNS record for your mail >>server. > >I do not, but I don't know how to change that Add it. :) Depending on your DNS server, you may or may not have a reverse DNS zone (your ISP may also manage it). If no reverse zone exists, add a new reverse DNS zone and add a PTR record for the system defined in your DNS MX record. >make sure you're not on a blacklist. I have checked. I >am not being blacklisted. There are many and you may not know. >And next time you can't >>get email through "for months" start looking at the [quoted text clipped - 8 lines] >the company's email working properly with no help from >ANYONE What has your ISP told you? And again, do they run your mail server? >If you could tell me how to do this things you suggested >in your email, I would greatly appreciate it. This chat >group was my last idea and I got a response back faster >than I did from any of the other places I tried. We have no life. :) Jeff I tried looking at the SMTP logs, but winnt\system32 \logfiles is empty. We always use the defaults when storing something, so I don't know where the logs could be. Yes, our ISP does host our DNS. We handle our own mail server and use our ISP as a passthrough. They don't offer us any firewalls. Our ISP has told us they have no idea what the problem is. As far as they are concerned their shouldn't be any problem. However, none of this occurred until we switched to their service. They have basically been of no assistance in this matter. They can't solve the problem, but refuse to let us out of the contract. Any further suggestions? Any other ideas on where logs might be stored? Thanks for all your help >-----Original Message----- > [quoted text clipped - 91 lines] >Jeff >. |
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